E141-02 - Forschungsbereich Atom Physics and Quantum Optics
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Date (published):
8-Feb-2022
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Event name:
MPQ
en
Event date:
7-Feb-2022 - 8-Feb-2022
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Event place:
München, Germany
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Keywords:
quantum quenches,
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Project title:
Quantum limited probing of many-body systems: 101032523 (European Commission)
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Additional information:
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 of many-body systems. 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. In a box-like trapping potential we follow the system’s dynamics beyond the non-thermal fixed point and observe its approach to thermal equilibrium. Here we characterize the underlying quasi-particle excitations by probing the dispersion relations and find two Goldstone modes which are associated with the emergence of long-range coherence in the density and spin degree of freedom.
