Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems

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dc.creatorWatanabe, Gentaro
dc.creatorPethick, C. J.
dc.date2007-01-12
dc.date2007-09-04
dc.date.accessioned2026-07-07T08:27:19Z
dc.date.available2026-07-07T08:27:19Z
dc.descriptionWe study the quantum dynamics of a model for a vortex in a Bose gas with repulsive interactions in an anisotropic, harmonic trap. By solving the Schrödinger equation numerically, we show that the circulation of the vortex can undergo periodic reversals by quantum-mechanical tunneling. With increasing interaction strength or particle number, vortices become increasingly stable, and the period for reversals increases. Tunneling between vortex and antivortex states is shown to be described to a good approximation by a superposition of vortex and antivortex states (a Schrödinger cat state), rather than the mean-field state, and we derive an analytical expression for the oscillation period. The problem is shown to be equivalent to that of the two-site Bose Hubbard model with attractive interactions.
dc.description5 pages, 5 figures; published in Phys. Rev. A, Rapid Communications
dc.identifierhttps://arxiv.org/abs/cond-mat/0701270
dc.identifierhttp://arxiv.org/abs/cond-mat/0701270
dc.identifierPhys. Rev. A 76, 021605(R) (2007)
dc.identifierdoi:10.1103/PhysRevA.76.021605
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/137230
dc.subjectMesoscale and Nanoscale Physics
dc.subjectNuclear Theory
dc.subjectQuantum Physics
dc.titleReversal of the circulation of a vortex by quantum tunneling in trapped Bose systems
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