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Title: Hysteresis in a superfluid atom circuit

Abstract

We study a hysteresis phenomenon in a rotating BEC with a weak link in a quasi-one-dimensional torus by proposing a microscopic theoretical model including a dissipation bath. By analyzing the role of dissipation and the decay rates of all the energy levels, we are able to give a microscopic interpretation of hysteresis recently observed in the experiment and confirm that the hysteresis is the result of the presence of metastable state. In particular, we obtain the hysteresis loops in a quench process just as that in the experiment. We also find that the shape and size of the hysteresis loop change drastically with the strength of the link.

Authors:
;
Publication Date:
OSTI Identifier:
22617389
Resource Type:
Journal Article
Resource Relation:
Journal Name: Annals of Physics; Journal Volume: 372; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOSE-EINSTEIN CONDENSATION; METASTABLE STATES; ONE-DIMENSIONAL CALCULATIONS; SUPERFLUIDITY

Citation Formats

Song, Tieling, and Zhou, D.L., E-mail: zhoudl72@iphy.ac.cn. Hysteresis in a superfluid atom circuit. United States: N. p., 2016. Web. doi:10.1016/J.AOP.2016.07.009.
Song, Tieling, & Zhou, D.L., E-mail: zhoudl72@iphy.ac.cn. Hysteresis in a superfluid atom circuit. United States. doi:10.1016/J.AOP.2016.07.009.
Song, Tieling, and Zhou, D.L., E-mail: zhoudl72@iphy.ac.cn. Thu . "Hysteresis in a superfluid atom circuit". United States. doi:10.1016/J.AOP.2016.07.009.
@article{osti_22617389,
title = {Hysteresis in a superfluid atom circuit},
author = {Song, Tieling and Zhou, D.L., E-mail: zhoudl72@iphy.ac.cn},
abstractNote = {We study a hysteresis phenomenon in a rotating BEC with a weak link in a quasi-one-dimensional torus by proposing a microscopic theoretical model including a dissipation bath. By analyzing the role of dissipation and the decay rates of all the energy levels, we are able to give a microscopic interpretation of hysteresis recently observed in the experiment and confirm that the hysteresis is the result of the presence of metastable state. In particular, we obtain the hysteresis loops in a quench process just as that in the experiment. We also find that the shape and size of the hysteresis loop change drastically with the strength of the link.},
doi = {10.1016/J.AOP.2016.07.009},
journal = {Annals of Physics},
number = ,
volume = 372,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 2016},
month = {Thu Sep 15 00:00:00 EDT 2016}
}