Non-equilibrium dynamics of fluctuations in an ultra-cold atomic mixture

• Verfasst von: Hegde, Apoorva Anant [VerfasserIn]
• Verfasst von: Ott, Robert [VerfasserIn]
• Verfasst von: Xia, Andy Xiyuan [VerfasserIn]
• Verfasst von: Kasper, Valentin [VerfasserIn]
• Verfasst von: Berges, Jürgen [VerfasserIn]
• Verfasst von: Jendrzejewski, Fred [VerfasserIn]
• Titel: Non-equilibrium dynamics of fluctuations in an ultra-cold atomic mixture
• Verf.angabe: Apoorva Hegde, Robert Ott, Andy Xia, Valentin Kasper, Jürgen Berges, and Fred Jendrzejewski
• E-Jahr: 2022
• Jahr: 13 Apr 2022
• Umfang: 9 S.
• Fussnoten: Gesehen am 20.09.2022
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2022
• Band/Heft Quelle: (2022), Artikel-ID 2204.06456, Seite 1-9
• DOI: doi:10.48550/arXiv.2204.06456
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Condensed Matter - Quantum Gases
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: Quantum Physics
• K10plus-PPN: 180804097X

Abstract

We investigate an ultra-cold mixture of Bose gases interacting via spin-changing collisions by studying the dynamics of spin fluctuations. The experimental implementation employs $^{23}$Na and $^{7}$Li atoms, which are prepared out of equilibrium across a wide range of initial conditions. We identify three regimes in the dynamics of the system for different initial states: a long-lived metastable regime, an instability range with strong growth of fluctuations, and a fast relaxing regime approaching thermal equilibrium. Theoretical modelling of the data allows us to reconstruct effective potentials which characterize the different dynamical regimes of the system.