Macroscopic quantum self-trapping of an ultracold Bose-Fermi mixture in a double-well potential
Date
2009
Authors
Caballero Benitez, Santiago
Gulacsi, Miklos
Ostrovskaya, Elena
Kivshar, Yuri
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Publisher
Institute of Physics Publishing
Abstract
We study the macroscopic quantum self-trapping effect in a mixture of Bose-Einstein condensate (BEC) and quantum degenerate fermions, confined in a double-well potential with a variable separation between the wells. The fermions form a finite-size cloud that affects the static and dynamical properties of the BEC. In particular, our quasi-analytical and numerical analysis based on a mean-field model shows that the main features of macroscopic quantum self-trapping in a pure bosonic system are modified by the influence of fermions. Both the onset of self-trapping and the properties of the self-trapped state depend on the amount of fermions in the system as well as on the type of inter-species interaction. The properties of the quantum degenerate mixture are explored using realistic parameters for a 40K-87Rb system.
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Keywords
Keywords: Bose-Einstein condensates; Bose-Fermi mixtures; Bosonic systems; Double-well potential; Macroscopic quantum self-trapping; Mean field models; Self-trapped state; Self-trapping; Species interactions; Static and dynamical properties; Ultra-cold; Variable se
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Source
Journal of Physics B: Atomic, Molecular and Optical Physics
Type
Journal article
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2037-12-31