Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 // Session D00

Topics:

Spin Squeezing of Itinerant Dipoles in an Erbium Quantum Gas Microscope

Poster 118

Presenter: Michal Szurek (Harvard University)

Authors: Alexander Douglas (Harvard University), Vassilios Kaxiras (Harvard University), Lin Su (Harvard University), Vikram Singh (Harvard University), Ognjen Markovic (Harvard University), Markus Greiner (Harvard University)

Long-range interactions promise new developments in the field of quantum enhanced sensing. The past two decades have seen significant interest in the creation of scalable spin squeezing and exploring squeezing generation with alternatives to the paradigmatic one-axis-twisting model. Here we experimentally demonstrate metrological squeezing using novel microwave clock transitions in the ground hyperfine manifold of 167Er that harbor appreciable XY interactions. Typically spin squeezing has been achieved with all-to-all interactions, which in the context of trapped atom experiments requires complex state and interaction engineering. Neutral atoms in a sufficiently tight-spacing lattice offer a different pathway to achieving spin-squeezing via the intrinsic magnetic dipole-dipole interaction. We find that by taking advantage of the hyperfine coupling between J and I every neutral atom can find a magnetically insensitive transition with appreciable dipolar exchange. These transitions enable coherent many body spin physics on the second timescale. Following recent theory work, we use one of these transitions to generate spin squeezing in a site-resolved optical lattice quantum simulator. Our lattice experiment enables tunneling allowing us to investigate the question of how itinerant particles impact spin-squeezing. This demonstration establishes a novel method for preparing a metrologically useful coherent spin-squeezed state in a variety of cold atom experimental platforms.

Funding acknowledgement

U.S. Department of Energy Quantum Systems Accelerator DE-AC02-05CH11231, National Science Foundation Center for Ultracold Atoms PHY-1734011, Army Research Office Defense University Research Instrumentation Program W911NF2010104, Office of Naval Research Vannevar Bush Faculty Fellowship N00014-18-1-2863, and Defense Advanced Research Projects Agency Optimization with Noisy Intermediate Scale Quantum devices W911NF-20-1-0021, NSF Graduate Research Fellowship Program (grant DGE2140743).

POSTERS (157)