Faculty Publications: June, 2013

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Title:
A PanSTARRS-1 Panoramic View of the Galactic Anticenter Structure
Authors:
Bell, Eric F.; Slater, C. T.; Morganson, E.; Schlafly, E.; Finkbeiner, D. P.; Juric, M.; Martin, N.; Rix, H.; Consortium, PanSTARRS-1
Publication:
American Astronomical Society, AAS Meeting #222, #313.02
Publication Date:
06/2013
Origin:
AAS
Abstract Copyright:
(c) 2013: American Astronomical Society
Bibliographic Code:
2013AAS...22231302B

Abstract

The Galactic Anticenter Structure (or Monoceros ring) has been interpreted as a Galactic warp, a flare, an outer disk structure caused by the accumulated damage on the thin disk by interactions with dark matter subhalos, or as the debris from a satellite disruption on a near-circular orbit well-aligned with the plane of the Milky Way. We present a new panoramic view of the Galactic Anticenter Structure from the PanSTARRS-1 survey derived from color-selected main sequence turn-off stars. The Galactic Anticenter Structure is prominent both north and south of the plane, and extends for more than 100 degrees in galactic latitude in both hemispheres. The feature is asymmetric, extends to higher galactic latitude in the north compared to the south, and is more substructured in the north. In both hemispheres, the density of stars drops off quickly at the edge of the feature, particularly so in the south. We present a preliminary comparison with three models, highlighting areas of qualitative agreement and disagreement: a smooth Galactic flare, a model of a disrupting dwarf on a near-circular orbit (Penarrubia et al. 2005; ApJ, 626, 128), and a model of the impact of subhalo interactions on the thin disk (Kazantzidis et al. 2008; ApJ, 688, 254).

 

Title:   Search for third generation scalar leptoquarks in pp collisions at √{s}=7 TeV with the ATLAS detector
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2890 coauthors.
Publication:
Journal of High Energy Physics, Volume 2013, article id. #33
Publication Date:
06/2013
Origin:
SPRINGER
Keywords:
Hadron-Hadron Scattering
Abstract Copyright:
(c) 2013: Cern for the benefit of the ATLAS collaboration
DOI:
10.1007/JHEP06(2013)033
Bibliographic Code:
2013JHEP...06..033A

Abstract

A search for pair-produced third generation scalar leptoquarks is presented, using proton-proton collisions at √{s}=7 TeV at the LHC. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 4.7 fb-1. Each leptoquark is assumed to decay to a tau lepton and a b-quark with a branching fraction equal to 100%. No statistically significant excess above the Standard Model expectation is observed. Third generation leptoquarks are therefore excluded at 95% confidence level for masses less than 534GeV. [Figure not available: see fulltext.]

 

Title:   Measurement of the cross-section for W boson production in association with b-jets in pp collisions at √{s}=7 TeV with the ATLAS detector
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2904 coauthors.
Publication:
Journal of High Energy Physics, Volume 2013, article id. #84
Publication Date:
06/2013
Origin:
SPRINGER
Keywords:
Hadron-Hadron Scattering
Abstract Copyright:
(c) 2013: CERN for the benefit of the ATLAS collaboration
DOI:
10.1007/JHEP06(2013)084
Bibliographic Code:
2013JHEP...06..084A

Abstract

This paper reports a measurement of the W + b-jets ( W + b+ X and W + boverline{b} + X) production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 fb-1, collected with the ATLAS detector. Cross-sections are presented as a function of jet multiplicity and of the transverse momentum of the leading b-jet for both the muon and electron decay modes of the W boson. The W + b-jets cross-section, corrected for all known detector effects, is quoted in a limited kinematic range. Combining the muon and electron channels, the fiducial cross-section for W + b-jets is measured to be 7.1 ± 0.5 (stat) ± 1.4 (syst) pb, consistent with the next-to-leading order QCD prediction, corrected for non-perturbative and double-parton interactions (DPI) contributions, of 4.70 ± 0.09 (stat) _{-0.49}^{+0.60 } (scale) ±0.06 (PDF) ±0.16 (non-pert) _{-0.38}^{+0.52 } (DPI) pb. [Figure not available: see fulltext.]

 

Title:
Measurement of the Electron's Electric Dipole Moment in Thorium Monoxide
Authors:
Baron, J.; Demille, D.; Doyle, J.; Gabrielse, G.; Hess, P.; Hutzler, N.; Oleary, B.; Panda, C.; Petrik, E.; Spaun, B.
Publication:
68th International Symposium on Molecular Spectroscopy, held 17-21 June, 2013 at Ohio State University. Abstract id. #ETF06.
Publication Date:
06/2013
Origin:
AUTHOR
Keywords:
MINI-SYMPOSIUM: SPECTROSCOPY TESTS OF FUNDAMENTAL PHYSICS
Bibliographic Code:
2013mss..confETF06B

Abstract

Some polar diatomic molecules have large effective internal electric fields ({E}_{eff}˜10^{11} V/cm that can be used to make measurements of the electron's electric dipole moment (eEDM) with unprecedented sensitivity. By performing precision spectroscopy on the metastable H ^{3}Δ_{1} state of ThO in a cryogenic buffer gas beam, we have demonstrated a statistical sensitivity to the eEDM of δ d_{e}≈1×10^{-28} e\cdot cm/√{T/{days}}, which is competitive with the current experimental limit, |d_{e}|<1.05×10^{-27}e\cdot cm. The existence of a non-zero eEDM on this level would be evidence for the existence of interactions that violate parity and time-reversal symmetries that are not included in the Standard Model. Many extensions to the Standard Model (in particular supersymmetric theories) predict the eEDM to be very close to the current experimental limit. We present an overview and discuss the characterization of systematic errors in this experiment.

E. R. Meyer and J. L. Bohn, Phys. Rev. A 78, 010502 (2008)

J. Hudson, D. Kara, J. Smallman, B. Sauer, M. Tarbutt, E. Hinds, Nature 473 493 (2011)

This work is supported by the NSF.

 

Title:
Dicke-model quantum spin and photon glass in optical cavities: Nonequilibrium theory and experimental signatures
Authors:
Buchhold, Michael; Strack, Philipp; Sachdev, Subir; Diehl, Sebastian
Publication:
Physical Review A, vol. 87, Issue 6, id. 063622 (PhRvA Homepage)
Publication Date:
06/2013
Origin:
APS
PACS Keywords:
Other Bose-Einstein condensation phenomena, Atoms, molecules, and ions in cavities, Quantum optics
DOI:
10.1103/PhysRevA.87.063622
Bibliographic Code:
2013PhRvA..87f3622B

Abstract

In the context of ultracold atoms in multimode optical cavities, the appearance of a quantum-critical glass phase of atomic spins has been predicted recently. Due to the long-range nature of the cavity-mediated interactions, but also the presence of a driving laser and dissipative processes such as cavity photon loss, the quantum optical realization of glassy physics has no analog in condensed matter and could evolve into a "cavity glass microscope" for frustrated quantum systems out of equilibrium. Here we develop the nonequilibrium theory of the multimode Dicke model with quenched disorder and Markovian dissipation. Using a unified Keldysh path integral approach, we show that the defining features of a low-temperature glass, representing a critical phase of matter with algebraically decaying temporal correlation functions, are seen to be robust against the presence of dissipation due to cavity loss. The universality class, however, is modified due to the Markovian bath. The presence of strong disorder leads to an enhanced equilibration of atomic and photonic degrees of freedom, including the emergence of a common low-frequency effective temperature. The imprint of the atomic spin-glass physics onto the photon subsystem realizes a "photon glass" state and makes it possible to detect the glass state by standard experimental techniques of quantum optics. We provide an unambiguous characterization of the superradiant and glassy phases in terms of fluorescence spectroscopy, homodyne detection, and the temporal photon correlation function g(2)(τ).

 

Title:
Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors
Authors:
Song, Can-Li; Yin, Yi; Zech, Martin; Williams, Tess; Yee, Michael M.; Chen, Gen-Fu; Luo, Jian-Lin; Wang, Nan-Lin; Hudson, E. W.; Hoffman, Jennifer E.
Publication:
Physical Review B, vol. 87, Issue 21, id. 214519 (PhRvB Homepage)
Publication Date:
06/2013
Origin:
APS
PACS Keywords:
Scanning tunneling microscopy
DOI:
10.1103/PhysRevB.87.214519
Bibliographic Code:
2013PhRvB..87u4519S

Abstract

We use scanning tunneling microscopy to map the surface structure, nanoscale electronic inhomogeneity, and vitreous vortex phase in the hole-doped superconductor Sr0.75K0.25Fe2As2 with Tc=32 K. We find that the low-T cleaved surface is dominated by a half Sr/K termination with 1×2 ordering and ubiquitous superconducting gap, while patches of gapless, unreconstructed As termination appear rarely. The superconducting gap varies by σ/Δ¯=16% on a ˜3 nm length scale, with average 2Δ¯/kBTc=3.6 in the weak-coupling limit. The vortex core size provides a measure of the superconducting coherence length ξ=2.3 nm. We quantify the vortex lattice correlation length at 9 T in comparison to several iron-based superconductors. The comparison leads us to suggest the importance of dopant size mismatch as a cause of dopant clustering, electronic inhomogeneity, and strong vortex pinning.

 

Title:
Quasiparticle band structures and interface physics of SnS and GeS
Authors:
Malone, Brad D.; Kaxiras, Efthimios
Publication:
Physical Review B, vol. 87, Issue 24, id. 245312 (PhRvB Homepage)
Publication Date:
06/2013
Origin:
APS
PACS Keywords:
Semiconductor compounds, Electron states at surfaces and interfaces
DOI:
10.1103/PhysRevB.87.245312
Bibliographic Code:
2013PhRvB..87x5312M

Abstract

We perform first-principles, density-functional-theory calculations of the electronic structure for the layered bulk materials SnS and GeS which are of interest for photovoltaic applications. Band gap corrections are computed within the GW approximation to the electron self-energy. The resulting quasiparticle gaps in both SnS and GeS are in excellent agreement with the majority of existing experimental measurements. In order to better understand the possible use of GeS layers as a carrier-confining barrier within a SnS-based photovoltaic device, we compute the band offsets for different orientations of a SnS/GeS heterojunction. We find the valence band offsets to be almost independent of interfacial direction while the conduction band offsets show a strong anisotropy as a result of the variation in the band gap caused by epitaxial strain along the different directions.

 

Title:
Publisher's Note: Nutrient shielding in clusters of cells [Phys. Rev. E 87, 062703 (2013)]
Authors:
Lavrentovich, Maxim O.; Koschwanez, John H.; Nelson, David R.
Publication:
Physical Review E, vol. 87, Issue 6, id. 069907 (PhRvE Homepage)
Publication Date:
06/2013
Origin:
APS
PACS Keywords:
Growth and division, Transport, including channels, pores, and lateral diffusion, Transition state theory and statistical theories of rate constants, Theory of diffusion and ionic conduction in solids, Publisher's note
DOI:
10.1103/PhysRevE.87.069907
Bibliographic Code:
2013PhRvE..87f9907L

Abstract

Not Available

 

Title:
Unconventional Magnetism via Optical Pumping of Interacting Spin Systems
Authors:
Lee, Tony E.; Gopalakrishnan, Sarang; Lukin, Mikhail D.
Publication:
Physical Review Letters, vol. 110, Issue 25, id. 257204 (PhRvL Homepage)
Publication Date:
06/2013
Origin:
APS
PACS Keywords:
Quantized spin models, Quantum optics, Ultracold gases, trapped gases, Magnetic phase boundaries
DOI:
10.1103/PhysRevLett.110.257204
Bibliographic Code:
2013PhRvL.110y7204L

Abstract

We consider strongly interacting systems of effective spins, subject to dissipative spin-flip processes associated with optical pumping. We predict the existence of novel magnetic phases in the steady state of this system, which emerge due to the competition between coherent and dissipative processes. Specifically, for strongly anisotropic spin-spin interactions, we find ferromagnetic, antiferromagnetic, spin-density-wave, and staggered-XY steady states, which are separated by nonequilibrium phase transitions meeting at a Lifshitz point. These transitions are accompanied by quantum correlations, resulting in spin squeezing. Experimental implementations in ultracold atoms and trapped ions are discussed.

 

Title:
Quantum flux and reverse engineering of quantum wave functions
Authors:
Mason, D. J.; Borunda, M. F.; Heller, E. J.
Publication:
Europhysics Letters, Volume 102, Issue 6, article id. 60005 (2013).
Publication Date:
06/2013
Origin:
IOP
DOI:
10.1209/0295-5075/102/60005
Bibliographic Code:
2013EL....10260005M

Abstract

An interpretation of the probability flux is given, based on a derivation of its eigenstates and relating them to coherent-state projections on a quantum wave function. An extended definition of the flux operator is obtained using coherent states. We present a "processed Husimi" representation, which makes decisions using many Husimi projections at each location. The processed Husimi representation reverse engineers or deconstructs the wave function, yielding the underlying classical ray structure. Our approach makes possible interpreting the dynamics of systems where the probability flux is uniformly zero or strongly misleading. The new technique is demonstrated by the calculation of particle flow maps of the classical dynamics underlying a quantum wave function in simple model systems such as a circular billiard with and without a magnetic field.

 

Title:
Optoelectronic properties of single-layer, double-layer, and bulk tin sulfide: A theoretical study
Authors:
Tritsaris, Georgios A.; Malone, Brad D.; Kaxiras, Efthimios
Publication:
Journal of Applied Physics, Volume 113, Issue 23, pp. 233507-233507-8 (2013). (JAP Homepage)
Publication Date:
06/2013
Origin:
AIP
Keywords:
ab initio calculations, crystal structure, energy gap, semiconductor materials, solar cells, tensile strength, tin compounds
PACS Keywords:
Semiconductor compounds, Deformation, plasticity, and creep, Deformation and plasticity, Inorganic compounds, Methods of electronic structure calculations
Abstract Copyright:
(c) 2013: American Institute of Physics
DOI:
10.1063/1.4811455
Bibliographic Code:
2013JAP...113w3507T

Abstract

SnS is a metal monochalcogenide suitable for use as absorber material in thin film photovoltaic cells. Its structure is an orthorhombic crystal of weakly coupled layers, each layer consisting of strongly bonded Sn-S units. We use first-principles calculations to study model single-layer, double-layer, and bulk structures of SnS in order to elucidate its electronic structure. We find that the optoelectronic properties of the material can vary significantly with respect to the number of layers and the separation between them: the calculated band gap is wider for fewer layers (2.72 eV, 1.57 eV, and 1.07 eV for single-layer, double-layer, and bulk SnS, respectively) and increases with tensile strain along the layer stacking direction (by ~55 meV/1% strain).

 

Title:   Manipulation of Molecules with Electromagnetic Fields
Authors:   Lemeshko, Mikhail; Krems, Roman V.; Doyle, John M.; Kais, Sabre
Publication:   eprint arXiv:1306.0912
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Physics - Atomic Physics, Physics - Atomic and Molecular Clusters, Physics - Chemical Physics, Physics - Optics, Quantum Physics
Comment:   850 references, 39 pages. To appear in the topical issue of Molecular Physics "Manipulation of Molecules with Electromagnetic Fields", edited by M. Lemeshko, R. Krems, J. Doyle, and S. Kais
Bibliographic Code:   2013arXiv1306.0912L

Abstract

The goal of the present article is to review the major developments that have led to the current understanding of molecule-field interactions and experimental methods for manipulating molecules with electromagnetic fields. Molecule-field interactions are at the core of several, seemingly distinct, areas of molecular physics. This is reflected in the organization of this article, which includes sections on Field control of molecular beams, External field traps for cold molecules, Control of molecular orientation and molecular alignment, Manipulation of molecules by non-conservative forces, Ultracold molecules and ultracold chemistry, Controlled many-body phenomena, Entanglement of molecules and dipole arrays, and Stability of molecular systems in high-frequency super-intense laser fields. The article contains 850 references.

 

Title:   Interference limits resolution of selection pressures from linked neutral diversity
Authors:   Good, Benjamin H.; Walczak, Aleksandra M.; Neher, Richard A.; Desai, Michael M.
Publication:   eprint arXiv:1306.1215
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Quantitative Biology - Populations and Evolution
Bibliographic Code:   2013arXiv1306.1215G

Abstract

Pervasive natural selection can strongly influence observed patterns of genetic variation, but these effects remain poorly understood when multiple selected variants segregate in nearby regions of the genome. Classical population genetics fails to account for interference between linked mutations, which grows increasingly severe as the density of selected polymorphisms increases. Here, we describe a simple limit that emerges when interference is common, in which the fitness effects of individual mutations play a relatively minor role. Instead, molecular evolution is determined by the variance in fitness within the population, defined over an effectively asexual segment of the genome (a ``linkage block''). We exploit this insensitivity in a new ``coarse-grained'' coalescent framework, which approximates the effects of many weakly selected mutations with a smaller number of strongly selected mutations with the same variance in fitness. This approximation generates accurate and efficient predictions for the genetic diversity that cannot be summarized by a simple reduction in effective population size. However, these results suggest a fundamental limit on our ability to resolve individual selection pressures from contemporary sequence data alone, since a wide range of parameters yield nearly identical patterns of sequence variability.

 

Title:   Evidence for Helical Nuclear Spin Order in GaAs Quantum Wires
Authors:   Scheller, C. P.; Liu, T.-M.; Barak, G.; Yacoby, A.; Pfeiffer, L. N.; West, K. W.; Zumbühl, D. M.
Publication:   eprint arXiv:1306.1940
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Condensed Matter - Mesoscale and Nanoscale Physics
Comment:   5 pages, 4 figures (color)
Bibliographic Code:   2013arXiv1306.1940S

Abstract

We present transport measurements of cleaved edge overgrowth GaAs quantum wires. The conductance of the first mode reaches 2 e^2/h at high temperatures T > 10 K, as expected. As T is lowered, the conductance is gradually reduced to 1 e^2/h, becoming T-independent at T < 0.1 K, while the device cools far below 0.1 K. This behavior is seen in several wires, is independent of density, and not altered by moderate magnetic fields B. The conductance reduction by a factor of two suggests lifting of the electron spin degeneracy in absence of B. Our results are consistent with theoretical predictions for helical nuclear magnetism in the Luttinger liquid regime.

 

Title:   Dissipative dynamics of a driven quantum spin coupled to a non-Markovian bath of ultracold fermions
Authors:   Knap, Michael; Abanin, Dmitry A.; Demler, Eugene
Publication:   eprint arXiv:1306.2947
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Condensed Matter - Quantum Gases, Condensed Matter - Mesoscale and Nanoscale Physics, Quantum Physics
Bibliographic Code:   2013arXiv1306.2947K

Abstract

We explore the dynamics and the steady-state of a driven quantum spin coupled to a bath of fermions, which can be realized with a strongly imbalanced mixture of ultra-cold atoms using currently available experimental tools. Radio-frequency driving can be used to induce tunneling between the spin states. The Rabi oscillations are modified due to the coupling of the quantum spin to the environment, which causes frequency renormalization and damping. The spin-bath coupling can be widely tuned by adjusting the scattering length through a Feshbach resonance. When the scattering potential creates a bound state, by tuning the driving frequency it is possible to populate either the ground state, in which the bound state is filled, or a metastable state in which the bound state is empty. In the latter case, we predict an emergent inversion of the steady-state magnetization. Our work shows that different regimes of dissipative dynamics can be explored with a quantum spin coupled to a bath of ultracold fermions.

 

Title:   Phonon Cooling and Lasing with Nitrogen-Vacancy Centers in Diamond
Authors:   Kepesidis, K. V.; Bennett, S. D.; Portolan, S.; Lukin, M. D.; Rabl, P.
Publication:   eprint arXiv:1306.5915
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Condensed Matter - Mesoscale and Nanoscale Physics
Comment:   13 pages, 6 figures
Bibliographic Code:   2013arXiv1306.5915K

Abstract

We investigate the strain-induced coupling between a nitrogen-vacancy impurity and a resonant vibrational mode of a diamond nanoresonator. We show that under near-resonant laser excitation of the electronic states of the impurity, this coupling can modify the state of the resonator and either cool the resonator close to the vibrational ground state or drive it into a large amplitude coherent state. We derive a semi-classical model to describe both effects and evaluate the stationary state of the resonator mode under various driving conditions. In particular, we find that by exploiting resonant single and multi-phonon transitions between near-degenerate electronic states, the coupling to high-frequency vibrational modes can be significantly enhanced and dominate over the intrinsic mechanical dissipation. Our results show that a single nitrogen-vacancy impurity can provide a versatile tool to manipulate and probe individual phonon modes in nanoscale diamond structures.

 

Title:   Mechanical Properties of Warped Membranes
Authors:   Kosmrlj, Andrej; Nelson, David R.
Publication:   eprint arXiv:1306.5941
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Condensed Matter - Soft Condensed Matter, Condensed Matter - Statistical Mechanics
Comment:   27 pages, 10 figures, submitted to Physical Review E
Bibliographic Code:   2013arXiv1306.5941K

Abstract

We explore how a frozen background metric affects the mechanical properties of planar membranes with a shear modulus. We focus on a special class of "warped membranes" with a preferred random height profile characterized by random Gaussian variables $h({\bf q})$ in Fourier space with zero mean and variance $<|h({\bf q})|^2> \sim q^{-d_h}$ and show that in the linear response regime the mechanical properties depend dramatically on the system size $L$ for $d_h \ge 2$. Membranes with $d_h=4$ could be produced by flash polymerization of lyotropic smectic liquid crystals. Via a self consistent screening approximation we find that the renormalized bending rigidity increases as $\kappa_R \sim L^{(d_h-2)/2}$ for membranes of size $L$, while the Young and shear modulii decrease according to $Y_R,\ \mu_R \sim L^{-(d_h-2)/2}$ resulting in a universal Poisson ratio. Numerical results show good agreement with analytically determined exponents.

 

Title:   An on-shell approach to factoriztion
Authors:   Feige, Ilya; Schwartz, Matthew D.
Publication:   eprint arXiv:1306.6341
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   High Energy Physics - Theory, High Energy Physics - Phenomenology
Comment:   48 pages
Bibliographic Code:   2013arXiv1306.6341F

Abstract

Factorization is possible due to the universal behavior of Yang-Mills theories in soft and collinear limits. Here, we take a small step towards a more transparent understanding of these limits by proving a form of perturbative factorization at tree- level using on-shell spinor helicity methods. We present a concrete and self-contained expression of factorization in which matrix elements in QCD are related to products of other matrix elements in QCD up to leading order in a power-counting parameter determined by the momenta of certain physical on-shell states. Our approach uses only the scaling of momenta in soft and collinear limits, avoiding any assignment of scaling behavior to unphysical (and gauge-dependent) fields. The proof of factorization exploits many advantages of helicity spinors, such as the freedom to choose different reference vectors for polarizations in different collinear sectors. An advantage of this approach is that once factorization is shown to hold in QCD, the transition to Soft-Collinear Effective Theory is effortless.

 

Title:   Spinodal decomposition in homogeneous and isotropic turbulence
Authors:   Perlekar, Prasad; Benzi, Roberto; Clercx, Herman J. H.; Nelson, David R.; Toschi, Federico
Publication:   eprint arXiv:1306.6712
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Physics - Fluid Dynamics
Bibliographic Code:   2013arXiv1306.6712P

Abstract

We study the competition between domain coarsening in a symmetric binary mixtures below the critical temperature and turbulent fluctuations. We find that the coarsening process is arrested in presence of turbulence. The physics of the process shares remarkable similarities with the behaviour of diluted turbulent emulsions and the arrest length scale can be estimated with an argument similar to the one proposed by Kolmogorov and Hinze for the maximal stability diameter of droplets in turbulence. Although in the absence of flow the microscopic diffusion constant is negative, turbulence does effectively arrest the inverse cascade of concentration fluctuations by making the low wavelength diffusion constant positive for scales above the Hinze length.

 

Title:   Quantum quasicrystals of spin-orbit coupled dipolar bosons
Authors:   Gopalakrishnan, Sarang; Martin, Ivar; Demler, Eugene A.
Publication:   eprint arXiv:1307.0002
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Condensed Matter - Quantum Gases, Quantum Physics
Comment:   5 pages, 3 figures, plus supplementary information
Bibliographic Code:   2013arXiv1307.0002G

Abstract

We study quasi-two-dimensional dipolar Bose gases in which the bosons experience a Rashba spin-orbit coupling. We show that the degenerate dispersion minimum due to the spin-orbit coupling, combined with the long-range dipolar interaction, can stabilize a number of quantum crystalline and quasicrystalline ground states. Coupling the bosons to a fermionic species can further stabilize these phases. We estimate that the crystalline and quasicrystalline phases should be detectable in realistic dipolar condensates, e.g., dysprosium, and discuss their symmetries and excitations.

 

Title:   Probing real-space and time resolved correlation functions with many-body Ramsey interferometry
Authors:   Knap, Michael; Kantian, Adrian; Giamarchi, Thierry; Bloch, Immanuel; Lukin, Mikhail D.; Demler, Eugene
Publication:   eprint arXiv:1307.0006
Publication Date:   06/2013
Origin:   ARXIV
Keywords:   Condensed Matter - Quantum Gases, Condensed Matter - Strongly Correlated Electrons, Quantum Physics
Comment:   5+4 pages, 4+3 figures
Bibliographic Code:   2013arXiv1307.0006K

Abstract

We propose to use Ramsey interferometry and single-site addressability, available in synthetic matter such as cold atoms or trapped ions, to measure real-space and time resolved spin correlation functions. These correlation functions directly probe the excitations of the system, which makes it possible to characterize the underlying many-body states. Moreover they contain valuable information about phase transitions where they exhibit scale invariance. We also discuss experimental imperfections and show that a spin-echo protocol can be used to cancel slow fluctuations in the magnetic field. We explicitly consider examples of the two-dimensional, antiferromagnetic Heisenberg model and the one-dimensional, long-range transverse field Ising model to illustrate the technique.

 

Title:   Search for a light charged Higgs boson in the decay channel H+ → cbar{s} in tbar{t} events using pp collisions at sqrt{s} = 7 TeV with the ATLAS detector
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2887 coauthors.
Publication:   The European Physical Journal C, Volume 73, article id. #2465 (EPJC Homepage)
Publication Date:   06/2013
Origin:   SPRINGER
Abstract Copyright:   (c) 2013: CERN for the benefit of the ATLAS collaboration
DOI:   10.1140/epjc/s10052-013-2465-z
Bibliographic Code:   2013EPJC...73.2465A

Abstract

A search for a charged Higgs boson ( H +) in tbar{t} decays is presented, where one of the top quarks decays via t→ H + b, followed by H +→ two jets (cbar{s}). The other top quark decays to Wb, where the W boson then decays into a lepton ( e/ μ) and a neutrino. The data were recorded in pp collisions at √{s} = 7 {TeV} by the ATLAS detector at the LHC in 2011, and correspond to an integrated luminosity of 4.7 fb-1. With no observation of a signal, 95 % confidence level (CL) upper limits are set on the decay branching ratio of top quarks to charged Higgs bosons varying between 5 % and 1 % for H + masses between 90 GeV and 150 GeV, assuming {B}(H+ → cbar{s})=100 %.

 

Title:   Probing charged matter through h → γγ, gamma ray lines, and EDMs
Authors:   Fan, JiJi; Reece, Matthew
Publication:   Journal of High Energy Physics, Volume 2013, article id. #4
Publication Date:   06/2013
Origin:   SPRINGER
Keywords:   Higgs Physics, CP violation
Abstract Copyright:   (c) 2013: SISSA, Trieste, Italy
DOI:   10.1007/JHEP06(2013)004
Bibliographic Code:   2013JHEP...06..004F

Abstract

Numerous experiments currently underway offer the potential to indirectly probe new charged particles with masses at the weak scale. For example, the tentative excess in h → γγ decays and the tentative gamma-ray line in Fermi-LAT data have recently attracted attention as possible one-loop signatures of new charged particles. We explore the interplay between such signals, dark matter direct detection through Higgs exchange, and measurements of the electron EDM, by studying the size of these effects in several models. We compute one-loop effects to explore the relationship among couplings probed by different experiments. In particular, models in which dark matter and the Higgs both interact with charged particles at a detectable level typically induce, at loop level, couplings between dark matter and the Higgs that are around the level of current direct detection sensitivity. Intriguingly, one-loop h → γγ and DM DM → γγ, two-loop EDMs, and loop-induced direct detection rates are all coming within range of existing experiments for approximately the same range of charged particle masses, offering the prospect of an exciting coincidence of signals at collider, astrophysical, underground and atomic physics measurements.

 

Title:   Jet sampling: improving event reconstruction through multiple interpretations
Authors:   Kahawala, Dilani; Krohn, David; Schwartz, Matthew D.
Publication:   Journal of High Energy Physics, Volume 2013, article id. #6
Publication Date:   06/2013
Origin:   SPRINGER
Keywords:   Jets, Hadronic Colliders
Abstract Copyright:   (c) 2013: SISSA, Trieste, Italy
DOI:   10.1007/JHEP06(2013)006
Bibliographic Code:   2013JHEP...06..006K

Abstract

The classification of events involving jets as signal-like or background-like can depend strongly on the jet algorithm used and its parameters. This is partly due to the fact that standard jet algorithms yield a single partition of the particles in an event into jets, even if no particular choice stands out from the others. As an alternative, we propose that one should consider multiple interpretations of each event, generalizing the Qjets procedure to event-level analysis. With multiple interpretations, an event is no longer restricted to either satisfy cuts or not satisfy them — it can be assigned a weight between 0 and 1 based on how well it satisfies the cuts. These cut-weights can then be used to improve the discrimination power of an analysis or reduce the uncertainty on mass or cross-section measurements. For example, using this approach on a Higgs plus Z boson sample, with Hto boverline{b} we find an 28% improvement in significance can be realized at the 8TeV LHC. Through a number of other examples, we show various ways in which having multiple interpretations can be useful on the event level.

 

Title:   Correction to Adsorption and Diffusion of Lithium on Layered Silicon for Li-Ion Storage
Authors:   Tritsaris, Georgios A.; Kaxiras, Efthimios; Meng, Sheng; Wang, Enge
Publication:   Nano Letters, vol. 13, issue 6, pp. 3004-3004
Publication Date:   06/2013
Origin:   CROSSREF
DOI:   10.1021/nl4018644
Bibliographic Code:   2013NanoL..13.3004T

Abstract

Not Available

 

Title:   Nuclear spin effects in semiconductor quantum dots
Authors:   Chekhovich, E. A.; Makhonin, M. N.; Tartakovskii, A. I.; Yacoby, A.; Bluhm, H.; Nowack, K. C.; Vandersypen, L. M. K.
Publication:   Nature Materials, Volume 12, Issue 6, pp. 494-504 (2013).
Publication Date:   06/2013
Origin:   NATURE
Abstract Copyright:   (c) 2013: Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.
DOI:   10.1038/nmat3652
Bibliographic Code:   2013NatMa..12..494C

Abstract

The interaction of an electronic spin with its nuclear environment, an issue known as the central spin problem, has been the subject of considerable attention due to its relevance for spin-based quantum computation using semiconductor quantum dots. Independent control of the nuclear spin bath using nuclear magnetic resonance techniques and dynamic nuclear polarization using the central spin itself offer unique possibilities for manipulating the nuclear bath with significant consequences for the coherence and controlled manipulation of the central spin. Here we review some of the recent optical and transport experiments that have explored this central spin problem using semiconductor quantum dots. We focus on the interaction between 104-106 nuclear spins and a spin of a single electron or valence-band hole. We also review the experimental techniques as well as the key theoretical ideas and the implications for quantum information science.

 

Title:   Adaptive fluid-infused porous films with tunable transparency and wettability
Authors:   Yao, Xi; Hu, Yuhang; Grinthal, Alison; Wong, Tak-Sing; Mahadevan, L.; Aizenberg, Joanna
Publication:   Nature Materials, Volume 12, Issue 6, pp. 529-534 (2013).
Publication Date:   06/2013
Origin:   NATURE
Abstract Copyright:   (c) 2013: Nature Publishing Group
DOI:   10.1038/nmat3598
Bibliographic Code:   2013NatMa..12..529Y

Abstract

Materials that adapt dynamically to environmental changes are currently limited to two-state switching of single properties, and only a small number of strategies that may lead to materials with continuously adjustable characteristics have been reported. Here we introduce adaptive surfaces made of a liquid film supported by a nanoporous elastic substrate. As the substrate deforms, the liquid flows within the pores, causing the smooth and defect-free surface to roughen through a continuous range of topographies. We show that a graded mechanical stimulus can be directly translated into finely tuned, dynamic adjustments of optical transparency and wettability. In particular, we demonstrate simultaneous control of the film’s transparency and its ability to continuously manipulate various low-surface-tension droplets from free-sliding to pinned. This strategy should make possible the rational design of tunable, multifunctional adaptive materials for a broad range of applications.

 

Title:   Non-equilibrium fractional quantum Hall state of light
Authors:   Hafezi, Mohammad; Lukin, Mikhail D.; Taylor, Jacob M.
Affiliation:   AA(Joint Quantum Institute, NIST/UMD, College Park, MD 20742, USA ;), AB(Physics Department, Harvard University, Cambridge, MA 02138, USA), AC(Joint Quantum Institute, NIST/UMD, College Park, MD 20742, USA)
Publication:   New Journal of Physics, Volume 15, Issue 6, article id. 063001 (2013).
Publication Date:   06/2013
Origin:   IOP
DOI:   10.1088/1367-2630/15/6/063001
Bibliographic Code:   2013NJPh...15f3001H

Abstract

We investigate the quantum dynamics of systems involving small numbers of strongly interacting photons. Specifically, we develop an efficient method to investigate such systems when they are externally driven with a coherent field. Furthermore, we show how to quantify the many-body quantum state of light via correlation functions. Finally, we apply this method to two strongly interacting cases: the Bose-Hubbard and fractional quantum Hall models, and discuss an implementation of these ideas in atom-photon system.

 

Title:   Search for a heavy narrow resonance decaying to eμ, eτ, or μτ with the ATLAS detector in s=7 TeVpp collisions at the LHC
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2888 coauthors.
Publication:   Physics Letters B, Volume 723, Issue 1-3, p. 15-32.
Publication Date:   06/2013
Origin:   ELSEVIER
Abstract Copyright:   CERN
DOI:   10.1016/j.physletb.2013.04.035
Bibliographic Code:   2013PhLB..723...15A

Abstract

This Letter presents the results of a search for a heavy particle decaying into an e±μ, e±τ, or μ±τ final state in pp collisions at s=7 TeV. The data were recorded with the ATLAS detector at the LHC during 2011 and correspond to an integrated luminosity of 4.6 fb. No significant excess above the Standard Model expectation is observed, and exclusions at 95% confidence level are placed on the cross section times branching ratio for the production of an R-parity-violating supersymmetric tau sneutrino. For a sneutrino mass of 500 (2000) GeV, the observed limits on the production cross section times branching ratio are 3.2 (1.4) fb, 42 (17) fb, and 40 (18) fb for the eμ, eτ, and μτ modes, respectively. These results considerably extend constraints from Tevatron experiments.

 

Title:   Optical conductivity of visons in Z2 spin liquids close to a valence bond solid transition on the kagome lattice
Authors:   Huh, Yejin; Punk, Matthias; Sachdev, Subir
Affiliation:   AA(Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA), AB(Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA), AC(Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA)
Publication:   Physical Review B, vol. 87, Issue 23, id. 235108 (PhRvB Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Magnetomechanical and magnetoelectric effects, magnetostriction, Conductivity phenomena in semiconductors and insulators
DOI:   10.1103/PhysRevB.87.235108
Bibliographic Code:   2013PhRvB..87w5108H

Abstract

We consider Z2 spin liquids on the kagome lattice on the verge of a valence bond solid (VBS) transition, where vortex excitations carrying Z2 magnetic flux—so-called visons—condense. We show that these vison excitations can couple directly to the external electromagnetic field, even though they carry neither spin nor charge. This is possible via a magnetoelastic coupling mechanism recently identified. [Potter, Senthil, and Lee, arXiv:1301.3495; Hao, Phys. Rev. BPRBMDO1098-012110.1103/PhysRevB.85.174432 85, 174432 (2012)] For the case of transitions to a 36-site unit cell VBS state, the corresponding finite ac conductivity has a specific power-law frequency dependence, which is related to the crossover exponent of the quantum critical point. The visons’ contribution to the optical conductivity at transitions to VBS states with a 12-site unit cell vanishes, however.

 

Title:   Optimal local control of coherent dynamics in custom-made nanostructures
Authors:   Blasi, Thomas; Borunda, Mario F.; Räsänen, Esa; Heller, Eric J.
Publication:   Physical Review B, vol. 87, Issue 24, id. 241303 (PhRvB Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Quantum dots, Computer modeling and simulation, Quantum wells, Quantum dots
DOI:   10.1103/PhysRevB.87.241303
Bibliographic Code:   2013PhRvB..87x1303B

Abstract

We apply quantum optimal control theory to establish a local voltage-control scheme that operates in conjunction with the numerically exact solution of the time-dependent Schrödinger equation. The scheme is demonstrated for high-fidelity coherent control of electronic charge in semiconductor double quantum dots. We find tailored gate voltages in the viable gigahertz regime that drive the system to a desired charge configuration with >99% yield. The results could be immediately verified in experiments and would play an important role in applications towards solid-state quantum computing.

 

Title:   Measurement of R=B(t→Wb)/B(t→Wq) in top-quark-pair decays using lepton+jets events and the full CDF run II dataset
Authors:   Aaltonen, T.; Amerio, S.; Amidei, D.;... Franklin, M....; Guimaraes da Costa, J.;...; and 406 coauthors.
Publication:   Physical Review D, vol. 87, Issue 11, id. 111101 (PhRvD Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Determination of Kobayashi-Maskawa matrix elements, Inclusive production with identified leptons, photons, or other nonhadronic particles, Top quarks
DOI:   10.1103/PhysRevD.87.111101
Bibliographic Code:   2013PhRvD..87k1101A

Abstract

We present a measurement of the ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where q represents quarks of type b, s, or d, in the final state with a lepton and hadronic jets. The measurement uses s=1.96TeV proton-antiproton collision data from 8.7fb-1 of integrated luminosity collected with the Collider Detector at Fermilab during Run II of the Tevatron. We simultaneously measure R=0.94±0.09 (stat+syst) and the tt¯ production cross section σtt¯=7.5±1.0(stat+syst)pb. The magnitude of the Cabibbo-Kobayashi-Maskawa matrix element, |Vtb|=0.97±0.05 (stat+syst) is extracted assuming three generations of quarks, and a lower limit of |Vtb|>0.89 at 95% credibility level is set.

 

Title:  
  Measurement of W+W- production in pp collisions at s=7TeV with the ATLAS detector and limits on anomalous WWZ and WWγ couplings
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2905 coauthors.
Publication:   Physical Review D, vol. 87, Issue 11, id. 112001 (PhRvD Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   W bosons, Extensions of electroweak gauge sector, Inelastic scattering: two-particle final states, Decays of W bosons
DOI:   10.1103/PhysRevD.87.112001
Bibliographic Code:   2013PhRvD..87k2001A

Abstract

This paper presents a measurement of the W+W- production cross section in pp collisions at s=7TeV. The leptonic decay channels are analyzed using data corresponding to an integrated luminosity of 4.6fb-1 collected with the ATLAS detector at the Large Hadron Collider. The W+W- production cross section σ(pp→W+W-+X) is measured to be 51.9±2.0(stat)±3.9(syst)±2.0(lumi)pb, compatible with the Standard Model prediction of 44.7-1.9+2.1pb. A measurement of the normalized fiducial cross section as a function of the leading lepton transverse momentum is also presented. The reconstructed transverse momentum distribution of the leading lepton is used to extract limits on anomalous WWZ and WWγ couplings.

 

Title:  
  Measurements of Wγ and Zγ production in pp collisions at s=7TeV with the ATLAS detector at the LHC
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2901 coauthors.
Publication:   Physical Review D, vol. 87, Issue 11, id. 112003 (PhRvD Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Electroweak interactions
DOI:   10.1103/PhysRevD.87.112003
Bibliographic Code:   2013PhRvD..87k2003A

Abstract

The integrated and differential fiducial cross sections for the production of a W or Z boson in association with a high-energy photon are measured using pp collisions at s=7TeV. The analyses use a data sample with an integrated luminosity of 4.6fb-1 collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the W and Z bosons [W(eν,μν) and Z(e+e-+μ-,νν¯)] with the requirement of an associated isolated photon. The data are used to test the electroweak sector of the Standard Model and search for evidence for new phenomena. The measurements are used to probe the anomalous WWγ, ZZγ, and Zγγ triple-gauge-boson couplings and to search for the production of vector resonances decaying to Zγ and Wγ. No deviations from Standard Model predictions are observed and limits are placed on anomalous triple-gauge-boson couplings and on the production of new vector meson resonances.

 

Title:   Search for B→K(*)νν¯ and invisible quarkonium decays
Authors:   Lees, J. P.; Poireau, V.; Tisserand, V.;... Morii, M.;...; and 338 coauthors.
Publication:   Physical Review D, vol. 87, Issue 11, id. 112005 (PhRvD Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Decays of bottom mesons, Decays of J/psi, Upsilon, and other quarkonia, Bottom mesons
DOI:   10.1103/PhysRevD.87.112005
Bibliographic Code:   2013PhRvD..87k2005L

Abstract

We search for the flavor-changing neutral-current decays B→K(*)νν¯, and the invisible decays J/ψ→νν¯ and ψ(2S)→νν¯ via B→K(*)J/ψ and B→K(*)ψ(2S), respectively, using a data sample of 471×106 BB¯ pairs collected by the BABAR experiment. We fully reconstruct the hadronic decay of one of the B mesons in the Υ(4S)→BB¯ decay, and search for the B→K(*)νν¯ decay in the rest of the event. We observe no significant excess of signal decays over background and report branching fraction upper limits of B(B+→K+νν¯)<3.7×10-5, B(B0→K0νν¯)<8.1×10-5, B(B+→K*+νν¯)<11.6×10-5, B(B0→K*0νν¯)<9.3×10-5, and combined upper limits of B(B→Kνν¯)<3.2×10-5 and B(B→K*νν¯)<7.9×10-5, all at the 90% confidence level. For the invisible quarkonium decays, we report branching fraction upper limits of B(J/ψ→νν¯)<3.9×10-3 and B(ψ(2S)→νν¯)<15.5×10-3 at the 90% confidence level. Using the improved kinematic resolution achieved from hadronic reconstruction, we also provide partial branching fraction limits for the B→K(*)νν¯ decays over the full kinematic spectrum.

 

Title:   Search for resonant diboson production in the WW/WZ→ℓνjj decay channels with the ATLAS detector at s=7TeV
Authors:   Aad, G.; Abajyan, T.; Abbott, B.;... Franklin, M....; Guimaraes da Costa, J.;... Huth, J.;... Morii, M.;...; and 2899 coauthors.
Publication:   Physical Review D, vol. 87, Issue 11, id. 112006 (PhRvD Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Technicolor models, Extensions of electroweak gauge sector
DOI:   10.1103/PhysRevD.87.112006
Bibliographic Code:   2013PhRvD..87k2006A

Abstract

A search for resonant diboson production using a data sample corresponding to 4.7fb-1 of integrated luminosity collected by the ATLAS experiment at the Large Hadron Collider in pp collisions at s=7TeV is presented. The search for a narrow resonance in the WW or WZ mass distribution is conducted in a final state with an electron or a muon, missing transverse momentum, and at least two jets. No significant excess is observed and limits are set using three benchmark models: WW resonance masses below 940 and 710 GeV are excluded at 95% confidence level for spin-2 Randall–Sundrum and bulk Randall–Sundrum gravitons, respectively; WZ resonance masses below 950 GeV are excluded at 95% confidence level for a spin-1 extended gauge model W' boson.

 

Title:   Nutrient shielding in clusters of cells
Authors:   Lavrentovich, Maxim O.; Koschwanez, John H.; Nelson, David R.
Publication:   Physical Review E, vol. 87, Issue 6, id. 062703 (PhRvE Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Growth and division, Transport, including channels, pores, and lateral diffusion, Transition state theory and statistical theories of rate constants, Theory of diffusion and ionic conduction in solids
DOI:   10.1103/PhysRevE.87.062703
Bibliographic Code:   2013PhRvE..87f2703L

Abstract

Cellular nutrient consumption is influenced by both the nutrient uptake kinetics of an individual cell and the cells' spatial arrangement. Large cell clusters or colonies have inhibited growth at the cluster's center due to the shielding of nutrients by the cells closer to the surface. We develop an effective medium theory that predicts a thickness ℓ of the outer shell of cells in the cluster that receives enough nutrient to grow. The cells are treated as partially absorbing identical spherical nutrient sinks, and we identify a dimensionless parameter ν that characterizes the absorption strength of each cell. The parameter ν can vary over many orders of magnitude among different cell types, ranging from bacteria and yeast to human tissue. The thickness ℓ decreases with increasing ν, increasing cell volume fraction ϕ, and decreasing ambient nutrient concentration ψ∞. The theoretical results are compared with numerical simulations and experiments. In the latter studies, colonies of budding yeast, Saccharomyces cerevisiae, are grown on glucose media and imaged under a confocal microscope. We measure the growth inside the colonies via a fluorescent protein reporter and compare the experimental and theoretical results for the thickness ℓ.

 

Title:   Measurement of Neutrino and Antineutrino Oscillations Using Beam and Atmospheric Data in MINOS
Authors:   Adamson, P.; Anghel, I.; Backhouse, C.;... Feldman, G. J.;......; and 106 coauthors.
Publication:   Physical Review Letters, vol. 110, Issue 25, id. 251801 (PhRvL Homepage)
Publication Date:   06/2013
Origin:   APS
PACS Keywords:   Neutrino mass and mixing, Ordinary neutrinos (nuW bosons, Beams in particle accelerators
DOI:   10.1103/PhysRevLett.110.251801
Bibliographic Code:   2013PhRvL.110y1801A

Abstract

We report measurements of oscillation parameters from νμ and ν¯μ disappearance using beam and atmospheric data from MINOS. The data comprise exposures of 10.71×1020 protons on target in the νμ-dominated beam, 3.36×1020 protons on target in the ν¯μ-enhanced beam, and 37.88 kton yr of atmospheric neutrinos. Assuming identical ν and ν¯ oscillation parameters, we measure |Δm2|=(2.41-0.10+0.09)×10-3eV2 and sin⁡2(2θ)=0.950-0.036+0.035. Allowing independent ν and ν¯ oscillations, we measure antineutrino parameters of |Δm¯2|=(2.50-0.25+0.23)×10-3eV2 and sin⁡2(2θ¯)=0.97-0.08+0.03, with minimal change to the neutrino parameters.

 

Title:
Selenium Segregation in Femtosecond-Laser Hyperdoped Silicon Revealed by Electron Tomography
Authors:
Haberfehlner, Georg; Smith, Matthew J.; Idrobo, Juan-Carlos; Auvert, Geoffroy; Sher, Meng-Ju; Winkler, Mark T.; Mazur, Eric; Gambacorti, Narciso; Gradečak, Silvija; Bleuet, Pierre
Publication:
Microscopy and Microanalysis, vol. 19, issue 03, pp. 716-725
Publication Date:
06/2013
Origin:
CROSSREF
DOI:
10.1017/S1431927613000342
Bibliographic Code:
2013MiMic..19..716H

Abstract

Not Available

 


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