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Harvard Physics Graduate Students Win National Awards

April 6, 2015

Clockwise from top left: Sabrina Pasterski (photo by P. Mitra), Alexandra Thomson, Elana Urbach, Julia Steinberg, Emma Rosenfeld, Ellen Klein.

Physics graduate students Ellen Klein, Sabrina Pasterski, Emma Rosenfeld, Julia Steinberg, and Elana Urbach are year's Harvard recipients of National Science Foundation's Graduate Research Fellowships Program. The Program recognizes and supports outstanding graduate students in NSF-supported science, technology, engineering, and mathematics disciplines who are pursuing research-based Master's and doctoral degrees at accredited United States institutions.

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Efficient Readout of a Single Spin State in Diamond via Spin-to-Charge Conversion

March 31, 2015
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Fig 1: SCC measurement idea. [Reprinted by permission from APS*].

In a new paper* in Physical Review Letters, postdoc Brendan Shields, together with colleagues Quirin Unterreithmeier, Nathalie de Leon, Prof. Hongkun Park and Prof. Mikhail Lukin, demonstrate a new method for efficient spin readout of nitrogen-vacancy (NV) centers in diamond.

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A Rotary Motor for Bacterial Gliding

March 31, 2015
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Fig 1: Evidence for a Rotary Motor [see A.Shrivastava, P. P. Lele, H.C. Berg, "A Rotary Motor Drives Flavobacterium Gliding," Current Biology 25 (2015)].

While probing the mystery of how some bacteria move across surfaces, Prof. Howard Berg and researchers in his group, Abhishek Shrivastava and Pushkar Lele, have discovered a kind of rotary motor in the bacterium Flavobacterium johnsoniae.

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Operation of a Broadband Visible-Wavelength Astro-Comb with a High- Resolution Astrophysical Spectrograph

March 20, 2015
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Fig. 3. (a) Dimensions of tapered photonic crystal fiber (PCF, not to scale). A solid-core PCF is tapered to the desired size over a few millimeters, which gives an adiabatic transition between the transverse modes of the large and small fiber cores. (b) Optical micrograph of tapered PCF with a sealed end.

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Oscillation of the Velvet Worm Slime Jet by Passive Hydrodynamic Instability

March 18, 2015
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Fig 2: Squirt system and papilla structure. [Reprinted under the terms of the Creative Commons Attribution License: A. Concha, P. Mellado, B. Morera-Brenes, C. Sampaio Costa, L Mahadevan & J. Monge-Nájera, "Oscillation of the velvet worm slime jet by passive hydrodynamic instability," Nature Communications 6: 6292 (17 March 2015) doi:10.1038/ncomms7292.]

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