Quantum coherent atomic tunneling between two trapped Bose-Einstein condensates
Quantum coherent atomic tunneling between two trapped Bose-Einstein condensates
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DOI：
10.1103/physrevlett.79.4950
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发表时间：
1997-12-22
影响因子：
8.6
通讯作者：
Shenoy, SR
中科院分区：
文献类型：
--
作者：
Smerzi, A;Fantoni, S;Shenoy, SR
研究了双势垒磁阱中两个零温玻色-爱因斯坦凝聚体(BEC)之间的相干原子隧穿，用传输矩阵元耦合的两个自作用BEC振幅的Gross-Pitaevskii方程描述了井间相位差和布居不平衡的动力学.除了常见的交流约瑟夫森效应和超导结中发生的等离子体振荡的非简谐推广外，BEC的非线性隧穿动力学还维持着一种自维持的布居不平衡：一种新的宏观量子自陷效应。
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.