Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup
Describing and understanding the motion of quantum gases out of equilibrium is one of the most important modern challenges for theorists. In the groundbreaking Quantum Newton Cradle experiment [Kinoshita, Wenger and Weiss, Nature 440, 900, 2006], quasi-one-dimensional cold atom gases were observe...
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| Format: | Article |
| Language: | English |
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SciPost
2019-06-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.6.6.070 |
| _version_ | 1818194552605900800 |
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| author | Jean-Sébastien Caux, Benjamin Doyon, Jérôme Dubail, Robert Konik, Takato Yoshimura |
| author_facet | Jean-Sébastien Caux, Benjamin Doyon, Jérôme Dubail, Robert Konik, Takato Yoshimura |
| author_sort | Jean-Sébastien Caux, Benjamin Doyon, Jérôme Dubail, Robert Konik, Takato Yoshimura |
| collection | DOAJ |
| description | Describing and understanding the motion of quantum gases out of equilibrium
is one of the most important modern challenges for theorists. In the
groundbreaking Quantum Newton Cradle experiment [Kinoshita, Wenger and Weiss,
Nature 440, 900, 2006], quasi-one-dimensional cold atom gases were observed
with unprecedented accuracy, providing impetus for many developments on the
effects of low dimensionality in out-of-equilibrium physics. But it is only
recently that the theory of generalized hydrodynamics has provided the adequate
tools for a numerically efficient description. Using it, we give a complete
numerical study of the time evolution of an ultracold atomic gas in this setup,
in an interacting parameter regime close to that of the original experiment. We
evaluate the full evolving phase-space distribution of particles. We simulate
oscillations due to the harmonic trap, the collision of clouds without
thermalization, and observe a small elongation of the actual oscillation period
and cloud deformations due to many-body dephasing. We also analyze the effects
of weak anharmonicity. In the experiment, measurements are made after release
from the one-dimensional trap. We evaluate the gas density curves after such a
release, characterizing the actual time necessary for reaching the asymptotic
state where the integrable quasi-particle momentum distribution function
emerges. |
| first_indexed | 2024-12-12T01:04:07Z |
| format | Article |
| id | doaj.art-1b7ae46da5e446e5801afe581e57b893 |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-12-12T01:04:07Z |
| publishDate | 2019-06-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-1b7ae46da5e446e5801afe581e57b8932022-12-22T00:43:38ZengSciPostSciPost Physics2542-46532019-06-016607010.21468/SciPostPhys.6.6.070Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setupJean-Sébastien Caux, Benjamin Doyon, Jérôme Dubail, Robert Konik, Takato YoshimuraDescribing and understanding the motion of quantum gases out of equilibrium is one of the most important modern challenges for theorists. In the groundbreaking Quantum Newton Cradle experiment [Kinoshita, Wenger and Weiss, Nature 440, 900, 2006], quasi-one-dimensional cold atom gases were observed with unprecedented accuracy, providing impetus for many developments on the effects of low dimensionality in out-of-equilibrium physics. But it is only recently that the theory of generalized hydrodynamics has provided the adequate tools for a numerically efficient description. Using it, we give a complete numerical study of the time evolution of an ultracold atomic gas in this setup, in an interacting parameter regime close to that of the original experiment. We evaluate the full evolving phase-space distribution of particles. We simulate oscillations due to the harmonic trap, the collision of clouds without thermalization, and observe a small elongation of the actual oscillation period and cloud deformations due to many-body dephasing. We also analyze the effects of weak anharmonicity. In the experiment, measurements are made after release from the one-dimensional trap. We evaluate the gas density curves after such a release, characterizing the actual time necessary for reaching the asymptotic state where the integrable quasi-particle momentum distribution function emerges.https://scipost.org/SciPostPhys.6.6.070 |
| spellingShingle | Jean-Sébastien Caux, Benjamin Doyon, Jérôme Dubail, Robert Konik, Takato Yoshimura Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup SciPost Physics |
| title | Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup |
| title_full | Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup |
| title_fullStr | Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup |
| title_full_unstemmed | Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup |
| title_short | Hydrodynamics of the interacting Bose gas in the Quantum Newton Cradle setup |
| title_sort | hydrodynamics of the interacting bose gas in the quantum newton cradle setup |
| url | https://scipost.org/SciPostPhys.6.6.070 |
| work_keys_str_mv | AT jeansebastiencauxbenjamindoyonjeromedubailrobertkoniktakatoyoshimura hydrodynamicsoftheinteractingbosegasinthequantumnewtoncradlesetup |