Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Unitary fermionic p-wave interactions in a 3D optical lattice.

Jul 19, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Degenerate gases, many-body physics, and quantum simulation Poster session

Description

Resonantly enhanced and controllable p-wave interactions in ultracold atomic systems are a promising test bed for realizing unconventional superconductors and superfluids with non-trivial transport properties. However, p-wave and other antisymmetric interactions are weak in naturally occurring systems, and their enhancement via the Feshbach mechanism has been limited by three-body loss. Here, we report on spectroscopic measurements of Feshbach-enhanced p-wave interactions of $^{40}$K, where three-body loss is suppressed by loading pairs of spin polarized atoms into a multi-band 3D optical lattice. Our measurements extend up to the unitary limit characterized by a diverging p-wave scattering volume. These measurements show excellent agreements to an exact solution for two harmonically confined atoms interacting via a p-wave pseudopotential, and to numerical solutions using an ab-initio interaction potential. We also demonstrate the coherence of the conversion process between non-interacting and strongly interacting atomic pairs by measuring Rabi oscillations. Furthermore, we demonstrate that losses of p-wave interacting pairs are limited by the intrinsic lifetime of the free-space molecular dimer, and we observe lifetimes that are fifty times larger than previous measurements in $^{40}$K.

Presenter name Vijin Venu
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Primary authors

Mr Vijin Venu (Department of Physics and CQIQC, University of Toronto) Mr Peihang Xu (Department of Physics and CQIQC, University of Toronto) Mr Frank Corapi (Department of Physics and CQIQC, University of Toronto) Ms Robyn Learn (Department of Physics and CQIQC, University of Toronto) Mr Mikhail Mamaev (JILA, NIST and Department of Physics, University of Colorado, Boulder) Mr Thomas Bilitewski (JILA, NIST and Department of Physics, University of Colorado, Boulder) Mr Jose P. D’Incao (JILA, NIST and Department of Physics, University of Colorado, Boulder) Ms Cora J. Fujiwara (Department of Physics and CQIQC, University of Toronto) Ms Ana Maria Rey (JILA, NIST and Department of Physics, University of Colorado, Boulder) Mr Joseph H. Thywissen (Department of Physics and CQIQC, University of Toronto)

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