Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates

Details Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates

1997-06-23

arxiv.org/abs/cond-mat/9706221v1

Physics

Condensed Matter

Soft Condensed Matter

RevTeX, 3 figures

Scientific paper

10.1103/PhysRevLett.79.4950

We study the coherent atomic tunneling between two zero-temperature Bose-Einstein condensates (BEC) confined in a double-well magnetic trap. Two Gross-Pitaevskii equations for the self-interacting BEC amplitudes, coupled by a transfer matrix element, describe the dynamics in terms of the inter-well phase-difference and population imbalance. In addition to the anharmonic generalization of the familiar $ac$ Josephson effect and plasma oscillations occurring in superconductor junctions, the non-linear BEC tunneling dynamics sustains a self-maintained population imbalance: a novel "macroscopic quantum self-trapping effect".

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