Fig.1 (A): Optical transitions of the NV center at 7 K. (a) All possible transitions between the ground and excited states, with direct transitions indicated with solid lines, and spin nonconserving cross transitions indicated with dashed lines. (b) Photoluminescence spectrum taken with cw microwave excitation. [©2015 American Physical Society]
Figure 1: Detecting surface electron spin ensembles using a scanning magnetometer composed of a single nitrogen-vacancy (NV) spin. (a): Schematic of the experiment. The NV spin resides in a nanopillar fabricated on a diamond scanning platform, with distance d from the sample surface. The angle between the normal direction of the surface and the quantization axis of the NV spin θ is imposed by crystallographic directions. The NV spin is optically initialized and read out from above. A nearby antenna is used to apply microwave pulses to manipulate the NV spin state coherently.
The physics Graduate Student Council (GSC) organized the Harvard Physics Research Poster Session with the intent of increasing intra-departmental communication between graduate students. Senior grad students working in physics labs presented their research to a fellow grad student audience who are either looking for a lab to join or who are simply curious about physics research. The GSC plans to organize this event annually.
See the slideshow of the event.
On January 21, 2015, Willy Shih, Robert and Jane Cizik Professor of Management and Practice at the Harvard Business School, gave a leadership workshop to 30 of our Research Scholars. In teams of five, with each person assigned a specific role, scholars used a computer simulation to climb Mt. Everest. You’ll have to talk with the participants to find out how their teams fared!
Figure 2: Inner structure of the skyrmion in the (x, z) plane. (a) In-trap SF densities of the |+1〉 (|−1〉) bosons form a vortex (antivortex) around the equator, whereas that of the |0〉 condensate in (b) creates a dark soliton at the poles. [from M. Kanász-Nagy, B. Dóra, E.A. Demler & G. Zaránd, "Stabilizing the false vacuum: Mott skyrmions," Scientific Reports 5:7692 | doi:10.1038/srep07692.