Extension of the Generalized Hydrodynamics to the Dimensional Crossover Regime
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- 5 March 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 126 (9), 090602
- https://doi.org/10.1103/physrevlett.126.090602
Abstract
In an effort to address integrability breaking in cold gas experiments, we extend the integrable hydrodynamics of the Lieb-Liniger model with two additional components representing the population of atoms in the first and second transverse excited states, thus enabling a description of quasi-1D condensates. Collisions between different components are accounted for through the inclusion of a Boltzmann-type collision integral in the hydrodynamic equation. Contrary to standard generalized hydrodynamics, our extended model captures thermalization of the condensate at a rate consistent with experimental observations from a quantum Newton’s cradle setup.Keywords
Funding Information
- Austrian Science Fund (SFB 1225, SFB F65)
- Vienna Science and Technology Fund (MA16-066)
- National Natural Science Foundation of China (1920101004, 91736208)
- ESQ
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