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Condensed Matter > Quantum Gases
Title: Hydrodynamic Attractor in Ultracold Atoms
(Submitted on 19 Apr 2024 (v1), last revised 26 Apr 2024 (this version, v2))
Abstract: The hydrodynamic attractor is a concept that describes universal equilibration behavior in which systems lose microscopic details before hydrodynamics becomes applicable. We propose a setup to observe hydrodynamic attractors in ultracold atomic gases, taking advantage of the fact that driving the two-body $s$-wave scattering length causes phenomena equivalent to isotropic fluid expansions. We specifically consider two-component fermions with contact interactions in three dimensions and discuss their dynamics under a power-law drive of the scattering length in a uniform system, employing a hydrodynamic relaxation model. We analytically solve their dynamics and find the hydrodynamic attractor solution. Our results establish the cold atom systems as a new platform for exploring hydrodynamic attractors.
Submission history
From: Keisuke Fujii [view email][v1] Fri, 19 Apr 2024 14:44:50 GMT (267kb,D)
[v2] Fri, 26 Apr 2024 03:26:30 GMT (267kb,D)
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