Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.88.063627
Title: Effective dynamics of cold atoms flowing in two ring-shaped optical potentials with tunable tunneling
Authors: Aghamalyan, D.
Amico, L.
Kwek, L.C. 
Issue Date: 13-Dec-2013
Source: Aghamalyan, D., Amico, L., Kwek, L.C. (2013-12-13). Effective dynamics of cold atoms flowing in two ring-shaped optical potentials with tunable tunneling. Physical Review A - Atomic, Molecular, and Optical Physics 88 (6) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.88.063627
Abstract: We study the current dynamics of coupled atomic condensates flowing in two ring-shaped optical potentials. We provide a specific setup where the ring-ring coupling can be tuned in an experimentally feasible way. It is demonstrated that the imaginary time effective action of the system in a weak coupling regime provides a two-level-system dynamics for the phase slip across the two rings. Through two-mode Gross- Pitaevskii mean-field equations, the real-time dynamics of the population imbalance and the phase difference between the two condensates is thoroughly analyzed analytically, as a function of the relevant physical parameters of the system. In particular, we find that the macroscopic quantum self-trapping phenomenon is induced in the system if the flowing currents assume a nonvanishing difference. © 2013 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/112424
ISSN: 10502947
DOI: 10.1103/PhysRevA.88.063627
Appears in Collections:Staff Publications

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