Self-Trapping State and Atomic Tunnelling Current of an Atomic Bose–Einstein Condensate Interacting with a Laser Field in a Double-Well Potential

2002 ◽  
Vol 37 (5) ◽  
pp. 623-626
Author(s):  
Yu Zhao-Xian ◽  
Jiao Zhi-Yong
Keyword(s):  
Laser Field ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Self Trapping ◽  
Bose Einstein ◽  
Double Well Potential ◽  
Tunnelling Current ◽  
Trapping State

Josephson dynamics of strongly interacting superfluid Fermi gases in double-well potentials

2020 ◽  
pp. 2150002
Author(s):  
Ji Li ◽  
Wen Wen ◽  
Yuke Zhang ◽  
Xiaodong Ma
Keyword(s):  
Einstein Condensate ◽  
Interaction Terms ◽  
Bose Einstein Condensate ◽  
Strongly Interacting ◽  
Fermi Superfluids ◽  
The Cross ◽  
Bose Einstein ◽  
Double Well Potential ◽  
Zero Phase ◽  
Superfluid Fermi

In this work, we study the nonlinear Josephson dynamics of Fermi superfluids in the crossover from Bardeen–Cooper–Schrieffer (BCS) superfluid to a molecular Bose-Einstein condensate (BEC) in a double-well potential. Under a two-mode approximation, we derive a full two-mode (fTM) model including all interaction energy terms. By solving the fTM model numerically, we study the zero-phase and [Formula: see text]-phase modes of Josephson oscillations in the BCS–BEC crossover. We find that in the strongly interacting regime the cross interaction terms not appearing in the two-mode model cannot be easily ignored. The cross interactions can alter the behaviors of Josephson dynamics substantially, and interestingly the alterations for the zero-phase and [Formula: see text]-phase modes are just opposite.

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