Poster Session

Poster Session I (4pm-6pm CDT)

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

Topics:

Controlling a many-body spin system of polar molecules

Poster 25

Presenter: Calder Miller (CU Boulder)

Authors: Annette Carroll (CU Boulder), Junyu Lin (CU Boulder), Henrik Hirzler (CU Boulder), Jun Ye (CU Boulder)

Due to their strong, long-range, and tunable dipolar interactions, ultracold molecules in optical lattices are a versatile platform for studying quantum many-body physics. We used Ramsey spectroscopy of rotational states of ultracold KRb molecules to explore the dynamics of a disordered system of interacting spins. In order to understand the microscopic mechanism of contrast decay observed in our recent work with itinerant molecules [1], we performed a systematic investigation of the role of motion on spin dynamics by adjusting the tunneling rate in a three-dimensional optical lattice. We also used Floquet engineering to tune the interactions between molecules, realizing a range of XXZ spin models and studying two-axis twisting mean-field dynamics. Finally, we will present progress towards preparing a deeply degenerate two-dimensional Fermi gas of polar molecules.

[1] Li, JR., Matsuda, K., Miller, C, Carroll, A. N., Tobias, W. G., Higgins, J. S., & Ye, J. Tunable itinerant spin dynamics with polar molecules. Nature 614, 70–74 (2023).

Funding acknowledgement

This material is based upon work supported by the US Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator. Additional support is acknowledged from the National Science Foundation grant no. QLCI OMA-2016244, the National Science Foundation grant no. Phys-1734006, ARO and AFOSR MURIs, and the National Institute of Standards and Technology. C. M. acknowledges support from the Department of Defense through the NDSEG Graduate Fellowship. A. N. C. acknowledges support from the National Science Foundation Graduate Research Fellowship under grant no. DGE 2040434.

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