Shenoy, Subodh R. (2002) Tunneling of trapped-atom Bose condensates Pramana - Journal of Physics, 58 (2). pp. 385-397. ISSN 0304-4289
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Official URL: http://www.ias.ac.in/pramana/v58/p385/fulltext.pdf
Related URL: http://dx.doi.org/10.1007/s12043-002-0022-0
Abstract
We obtain the dynamics in number and phase difference, for Bose condensates that tunnel between two wells of a double-well atomic trap, using the (nonlinear) Gross-Pitaevskii equation. The dynamical equations are of the canonical form for the two conjugate variables, and the Hamiltonian corresponds to that of a momentum-shortened pendulum, supporting a richer set of tunneling oscillation modes than for a superconductor Josephson junction, that has a fixed-length pendulum as a mechanical model. Novel modes include 'inverted pendulum' oscillations with an average angle of π; and oscillations about a self-maintained population imbalance that we term 'macroscopic quantum self-trapping'. Other systems with this phase-number nonlinear dynamics include two-component (interconverting) condensates in a single harmonic trap, and He3B superfluids in two containers connected by micropores.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | Tunneling; Bose-Einstein Condensates; Trapped Atoms; Pendulum |
ID Code: | 46055 |
Deposited On: | 30 Jun 2011 10:02 |
Last Modified: | 18 May 2016 02:06 |
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