Bloch Oscillations of Bosonic Lattice Polarons

December 9, 2014
Figure 1

Copyright 2014 by the American Physical Society

Figure 1: (a) An impurity (blue) is immersed in a homogeneous 3D BEC (red) and constrained to the lowest band of a 1D optical lattice. Strong interactions with the Bose gas lead to polaron formation and a modified dispersion. [From F. Grusdt, A. Shashi, D. Abanin, and E. Demler, "Bloch oscillations of bosonic lattice polarons," Phys. Rev. A 90, 063610 (4 Dec 2014), http://dx.doi.org/10.1103/PhysRevA.90.063610]


Higgs Criticality in a Two-Dimensional Metal

December 8, 2014

FIG. 1: the proposed phase diagram for the hole-doped cuprates, building on a theory for Higgs criticality for the optimal doping QCP. The lgebraic charge liquids (ACLs) have Fermi surfaces of spinless fermions which carry the electromagnetic charge: in the SU(2) ACL the Fermi surface is 'large' and is coupled to an emergent SU(2) gauge field, while in the U(1) ACL the Fermi surface is 'small' and coupled to an emergent U(1) gauge field. The fractionalized Fermi liquid (FL*) descends from the U(1) ACL by the binding of fermions to neutral spinons.


Professor Amir Yacoby

December 8, 2014

Prof. Amir Yacoby

Prof. Yacoby has been selected a Fellow of the American Association for the Advancement of Science (AAAS). Chosen by their peers, the Fellows are honored "for their contributions to innovation, education, and scientific leadership."


Principles of Scientific Inquiry: Wave Phenomena 2014

December 5, 2014
PSI Presentations

How do you build a short pulse laser only from materials available 100 years ago? How do you make color holograms, explore how a violin works, measure the "Ether wind"? How can you trap particles with light or build a flute?

These are some of the questions which this year's students addressed independently in their experimental projects for "Principles of Scientific Inquiry", the lab component of Physics 15c.


2015 Goldhaber Prize Winners

November 25, 2014
Graduate students Dennis Huang, Siyuan Sun, Bo Liu, and Shu-Heng Shao (pictured above, clockwise from top left) are the winners of the 2015 Maurice and Gertrude Goldhaber Prize. The prize is awarded annually by the department to its most outstanding current PhD students after they pass their qualifying exams, based on their accomplishments, creativity, and innovative approaches to research, as determined by a vote of the faculty.

Observation of an Excited Bc+/- Meson State with the ATLAS Detector

November 24, 2014

Figure 1: Invariant mass distributions of the reconstructed Bc± → J/ψπ± candidates in 7 TeV data (top) and in 8 TeV data (bottom). The data are represented by the points with error bars (statistical only). The solid line is the projection of the results of the unbinned maximum likelihood fit to all candidates in the mass range 5620–6820 MeV. The dashed line is the projection of the background component of the same fit. [From G. Aad et al.