Relaxation dynamics of a two-dimensional Bose gas
ORAL
Abstract
Quantum many-body systems out of equilibrium are notoriously hard to treat theoretically. In past years it has been suggested that in certain scenarios the relaxation dynamics of such isolated many-body systems exhibit self-similar spatiotemporal scaling as they approach a non-thermal fixed point. So far, self-similar relaxation dynamics were observed with quasi-1D gases and with 3D gases; here we report the first such observation in a box-trapped 2D Bose gas.
We prepare a non-interacting 2D gas in a far-from-equilibrium state with a non-thermal momentum distribution that features a sharp UV cutoff and reduced occupation of low-momentum states. To initiate the relaxation dynamics we suddenly turn on the interactions. We observe bidirectional particle and energy conserving relaxation dynamics with self-similar spatiotemporal scaling revealed in the momentum distribution of the cloud.
We prepare a non-interacting 2D gas in a far-from-equilibrium state with a non-thermal momentum distribution that features a sharp UV cutoff and reduced occupation of low-momentum states. To initiate the relaxation dynamics we suddenly turn on the interactions. We observe bidirectional particle and energy conserving relaxation dynamics with self-similar spatiotemporal scaling revealed in the momentum distribution of the cloud.
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Presenters
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Martin Gazo
University of Cambridge, University Of Cambridge
Authors
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Martin Gazo
University of Cambridge, University Of Cambridge
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Andrey Karailiev
University of Cambridge
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Tanish Satoor
University of Cambridge, Cavendish Laboratory, University of Cambridge
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Nishant Dogra
University of Cambridge
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Maciej Galka
University of Cambridge
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Zoran Hadzibabic
Univ of Cambridge, University of Cambridge