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Quantum swapping of immiscible Bose-Einstein condensates as an alternative to the Rayleigh-Taylor instability | D. Kobyakov
; A. Bezett
; E. Lundh
; M. Marklund
; V. Bychkov
; | Date: |
12 Dec 2011 | Abstract: | We consider a two-component Bose-Einstein condensate in a
quasi-one-dimensional harmonic trap, where the immiscible components are
pressed against each other by an external magnetic force. The zero-temperature
non-stationary Gross-Pitaevskii equations are solved numerically; analytical
models are developed for the key steps in the process. We demonstrate that if
the magnetic force is strong enough, then the condensates may swap their places
in the trap due to dynamic quantum interpenetration of the nonlinear matter
waves. The swapping is accompanied by development of a modulational instability
leading to quasi-turbulent excitations. Unlike the multidimensional
Rayleigh-Taylor instability in a similar geometry of two-component quantum
fluid systems, quantum interpenetration has no classical analogue. A crossover
between the Rayleigh-Taylor instability and the quantum interpenetration in a
two-dimensional geometry is demonstrated. | Source: | arXiv, 1112.2566 | Services: | Forum | Review | PDF | Favorites |
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