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2014 Highly-Cited Researchers: Demler, Kim, Lukin, Sachdev, and Yacoby

October 22, 2014

 

Thomson-Reuters Highly Cited Researchers represents some of world’s leading scientific minds. Over three thousand researchers (144 of them in physics) earned the distinction by writing the greatest numbers of reports officially designated by Essential Science Indicators℠ as Highly Cited Papers—ranking among the top 1% most cited for their subject field and year of publication, earning them the mark of exceptional impact.

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Suppressing Qubit Dephasing Using Real-Time Hamiltonian Estimation

October 21, 2014
ΔBz oscillations

ΔBz oscillations.: (a) The pulse sequence used to estimate ΔBz. (b) Using nuclear feedback, ΔBz oscillations decay in a coherence time due to residual slow fluctuations in ΔBz. (c) The Ramsey sequence used to operate the S-T*2 ≈ qubit in the rotating frame. (d) The Ramsey contrast (blue dots) decays in a characteristic time (solid line fit ) similar to the oscillations in b due to the same residual slow fluctuations in ΔBz. (e) The Rabi pulse sequence used to drive the qubit in the rotating frame.

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How to Make (Almost) Anything

October 19, 2014

The Harvard Physics Teaching Lab is hosting a section of a course taught by Neil Gershenfeld (MIT) and offered jointly at MIT and Harvard, "How to Make (Almost) Anything." The Harvard section is comprised of five women and eleven men from across the campus, including students and staff from Physics, SEAS, GSD, and other departments.

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Hoffman, Kim, Yacoby receive 2014 Moore Foundation Experimental Investigator Award in Emergent Phenomena in Quantum Systems

September 30, 2014
Moore Foundation

The Gordon and Betty Moore Foundation, after a national competition, has selected nineteen Moore Experimental Investigators in Emergent Phenomena in Quantum Systems, among them three Harvard Physics professors: Jenny Hoffman, Philip Kim, and Amir Yacoby.

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A New Way to Improve Efficiency of Solar Cells by Overcoming Exciton 'Traps'

September 24, 2014
Phase diagram of exciton topological phases

Phase diagram of exciton topological phases: a,b, Diagrams for the upper and lower energy exciton Hamiltonians (v = L, U), respectively. Light and dark blue regions denote topologically non-trivial phases with Chern number equal to − 1 and 1, exhibiting edge states with anticlockwise and clockwise exciton currents, respectively. Switching the direction of the magnetic field to Bz

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Scaling Macroscopic Aquatic Locomotion

September 17, 2014
Aquatic swimming

Aquatic swimming: a,The organisms considered in the article span eight orders of magnitude in Reynolds number and encompass larvae (from mayfly to zebrafish), fish (from goldfish, to stingrays and sharks), amphibians (tadpoles), reptiles (alligators), marine birds (penguins) and large mammals (from manatees and dolphins to belugas and blue whales). Blue fish sketch by Margherita Gazzola. b, Swimmer of length L is propelled forward with velocity U by pushing a bolus of water14, 20, 24 through body undulations characterized by tail beat amplitude A and frequency ω.

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