Quantum coherent atomic tunneling between two trapped Bose-Einstein condensates

Year: 1997

Authors: Smerzi A., Fantoni S., Giovanazzi S., Shenoy S.R.

Autors Affiliation: Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy; INFM, I-34014 Trieste, Italy; Int Ctr Theoret Phys, I-34100 Trieste, Italy.

Abstract: 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 interwell phase difference anti population imbalance. In addition to the anharmonic generalization of the familiar ac Josephson effect and plasma oscillations occurring in superconductor junctions, the nonlinear BEC tunneling dynamics sustains a self-maintained population imbalance: a novel macroscopic quantum self-trapping effect.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 79 (25)      Pages from: 4950  to: 4953

KeyWords: Collective Excitations; Gas
DOI: 10.1103/PhysRevLett.79.4950

Citations: 1146
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