Quasi-spin Model for Macroscopic Quantum Tunnelling between Two Coupled Bose-Einstein Condensates

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dc.creatorLee, Chaohong
dc.creatorHai, Wenhua
dc.creatorLuo, Xueli
dc.creatorShi, Lei
dc.creatorGao, Kelin
dc.date2002-06-09
dc.date2003-10-15
dc.date.accessioned2026-07-07T02:45:47Z
dc.date.available2026-07-07T02:45:47Z
dc.descriptionThe macroscopic quantum tunneling between two coupled Bose-Einstein condensates (BEC) (radio-frequency coupled two-component BECs or two BECs confined in a double-well potential) is mapped onto the tunneling of an uniaxial spin with an applied magnetic field. The tunneling exponent is calculated with an imaginary-time path-integral method. In the limit of low barrier, the dependence of tunneling exponent on the system parameters is obtained, and the crossover temperature from thermal regime to quantum regime is estimated. The detailed information about the tunnelling will give help to control population conversion between coupled BECs and realize quantum computation with coupled BECs.
dc.description20 pages, 4 figures, accepted by Phys.Rev.A
dc.identifierhttps://arxiv.org/abs/cond-mat/0206134
dc.identifierhttp://arxiv.org/abs/cond-mat/0206134
dc.identifierPhys. Rev. A 68, 053614 (2003)
dc.identifierdoi:10.1103/PhysRevA.68.053614
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19427
dc.subjectMesoscale and Nanoscale Physics
dc.titleQuasi-spin Model for Macroscopic Quantum Tunnelling between Two Coupled Bose-Einstein Condensates
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