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|Title:||Effective dynamics of cold atoms flowing in two ring-shaped optical potentials with tunable tunneling||Authors:||Aghamalyan, D.
|Issue Date:||13-Dec-2013||Citation:||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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