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Poster Session

Poster Session III

4:00 pm – 6:00 pm, Thursday June 19 Session S00 Oregon Convention Center:, Exhibit Hall E
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Towards Joule Expansion and Spin Transport of Fermi Gases in a Mutli-region Trap

Poster 103
Presenter: Ariel T Sommer (Lehigh University)
Authors: Maximillian Mrozek-McCourt (Lehigh University), Ming Lian (Lehigh University), Zachary Blogg (Lehigh University), Daniel Huffman (Lehigh University), Loghan Michell (Lehigh University), Nikolas Cruz (Lehigh University)

An optical trap divided into multiple regions by programmable optical potentials provides a versatile platform for experiments on quantum gases out of equilibrium. We experimentally demonstrate the preparation of non-equilibrium initial states using a programmable potential controlled by a digital micromirror device (DMD), and propose protocols for Joule expansion and spin transport. Joule expansion in a unitary Fermi gas defines a well-posed problem in non-equilibrium dynamics, where the final state can be predicted from equilibrium thermodynamics, while the intermediate evolution provides a testbed for the dynamics of quantum fluids. We further present a protocol for the measurement of spin transport in a multi-region trap, showing how non-equilibrium spin and density distributions can be prepared using magnetic field gradients and light sheets, providing initial conditions for precise measurements of spin diffusivity and spin-heat coupling.

Funding acknowledgement

Supported by the US National Science Foundation (Award No. 2110483) and a Lehigh University Faculty Innovation Grant (Grant No. FIGAWD274)

POSTERS (141)