Prüfer, M. (2022, May 5). From a non-thermal fixed point to thermal equilibrium with one-dimensional Bose gases [Conference Presentation]. Finite Temperature Non-equilibrium Superfluid Systems 2022, St. Martin, Deutsche Weinstrasse, Germany.
E141-02 - Forschungsbereich Atom Physics and Quantum Optics
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Datum (veröffentlicht):
5-Mai-2022
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Veranstaltungsname:
Finite Temperature Non-equilibrium Superfluid Systems 2022
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Veranstaltungszeitraum:
2-Mai-2022 - 6-Mai-2022
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Veranstaltungsort:
St. Martin, Deutsche Weinstrasse, Deutschland
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Keywords:
quantum simulations
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Abstract:
On the macroscopic level novel, and even universal, phenomena can emerge. The underlying loss of information makes these phenomena insensitive to microscopic details and thus renders them interesting for quantum simulations. I will present experimental studies with 87Rb spinor Bose-Einstein condensates obtained in the Oberthaler group in Heidelberg. Employing quantum quenches, we bring the system out of equilibrium and observe transient universal phenomena associated with the emergence of a non-thermal fixed point [1] and a suppression of the four-vertex at low momenta in the highly occupied regime [2]. We follow the system’s dynamics beyond the non-thermal fixed point and observe its approach to thermal equilibrium. We characterize the underlying quasi-particle excitations by probing the dispersion relations. We find two Goldstone modes which are associated with the emergence of long-range coherence in the density and spin degree of freedom [3].
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Projekttitel:
Quantum limited probing of many-body systems: 101032523 (European Commission)