Quasi-spin Model for Macroscopic Quantum Tunnelling between Two Coupled Bose-Einstein Condensates
arXiv:cond-mat/0206134 · doi:10.1103/PhysRevA.68.053614
Abstract
The 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.
20 pages, 4 figures, accepted by Phys.Rev.A
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Cited by in corpus (11)
- Nonlinear quantum interferometry with Bose condensed atoms
- Macroscopic quantum tunnelling of Bose-Einstein condensates in a finite potential well
- Incoherent excitation and switching of spin states in exciton-polariton condensates
- Phase-Dependent Spontaneous Spin Polarization and Bifurcation Delay in Coupled Two-Component Bose-Einstein Condensates
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