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NMR Sees the Spin of a Single Proton

November 5, 2014
Coherent control of reporter spins

Figure 2(a): Coherent control of reporter spins. Rabi oscillations between spin states with a variable-width pulse (red points) with an exponentially damped fit (blue line). Inset: rf pulse sequence. [From: A. Sushkov, I. Lovchinsky, N. Chisholm, R.L. Walsworth, H. Park, and M.D. Lukin, "Magnetic Resonance Detection of Individual Proton Spins Using Quantum Reporters," Phys. Rev. Lett. 113, 197601 | DOI: http://dx.doi.org/10.1103/PhysRevLett.113.197601. Copyright ©2014 by The American Physical Society]

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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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