Nonequilibrium quantum dynamics of partial symmetry breaking for ultracold bosons in an optical lattice ring trap

• Verfasst von: Zhao, Xinxin [VerfasserIn]
• Verfasst von: Carr, Lincoln D. [VerfasserIn]
• Titel: Nonequilibrium quantum dynamics of partial symmetry breaking for ultracold bosons in an optical lattice ring trap
• Verf.angabe: Xinxin Zhao, Marie A. McLain, J. Vijande, A. Ferrando, Lincoln D. Carr and M.Á García-March
• E-Jahr: 2019
• Jahr: 23 April 2019
• Umfang: 13 S.
• Fussnoten: Gesehen am 18.07.2019
• Titel Quelle: Enthalten in: New journal of physics
• Ort Quelle: [Bad Honnef] : Dt. Physikalische Ges., 1999
• Jahr Quelle: 2019
• Band/Heft Quelle: 21(2019,4) Artikel-Nummer 043042, 13 Seiten
• ISSN Quelle: 1367-2630
• DOI: doi:10.1088/1367-2630/ab0cb0
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1669416704

Abstract

A vortex in a Bose-Einstein condensate on a ring undergoes quantum dynamics in response to a quantum quench in terms of partial symmetry breaking from a uniform lattice to a biperiodic one. Neither the current, a macroscopic measure, nor fidelity, a microscopic measure, exhibit critical behavior. Instead, the symmetry memory succeeds in identifying the critical symmetry breaking at which the system begins to forget its initial symmetry state. We further identify a symmetry energy difference in the low lying excited states which trends with the symmetry memory.