Nonlinear Landau-Zener tunneling of Bose-Einstein condensate in a spatially magnetic modulated trap

Nonlinear Landau-Zener tunneling of Bose-Einstein condensate in a spatially magnetic modulated trap
复制标题

空间磁调制陷阱中玻色-爱因斯坦凝聚体的非线性朗道-齐纳隧道效应

DOI:
10.1134/s1054660x09040239
复制
发表时间:
2009-04
期刊:
影响因子:
1.2
通讯作者:
Fu, Li-Bin
Fu, Li-Bin
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Liu, Jie;Yang, Li-Yun;Fu, Li-Bin

文献摘要

参考文献

相似文献

我们研究了被限制在有效双阱势(实际上是具有空间磁调制散射长度的单井)中的玻色-爱因斯坦凝聚体的隧道效应,称为伪双阱阱,其中原子的相互作用以s波散射长度为特征,可以通过磁场费什巴赫共振进行广泛调谐。因此,对应于不同的非线性参数,非线性Schrödinger方程的能级随井间偏置的关系可能具有复杂的结构。我们讨论了环状能级的出现,它导致绝热性的破坏,即使在绝热极限下,朗道-齐纳跃迁概率也不会消失。此外,我们还发现,在伪陷阱中的朗道-齐纳隧道显示出许多与真实陷阱模型(其中的势垒是由外部电位产生的)不同的显著特性。提出了在光折变材料中进行光诱导光子晶格实验观察的可能性。
We study tunneling of a Bose-Einstein condensates confined in a effective double-well potential (a single well with a spatially magnetic modulated scattering length, actually), called pseudo double-well trap, in which the interaction of atoms characterized by the s-wave scattering length as can be widely tuned with a magnetic-field Feshbach resonance. As a result, corresponding to different nonlinear parameters, the energy levels of the nonlinear Schrödinger equation can have complex structures in their dependence on the bias between the wells. We discuss the emergence of looped levels, which lead to a breakdown of adiabaticity that the Landau-Zener transition probability does not vanish even in the adiabatic limit. Moreover, we also find that the Landau-Zener tunneling in the pseudo trap show many striking properties distinguished from that of the real trap model (where the barrier is created by the external potential). Possible experimental observation in an opticallyinduced photonic lattices in a photorefractive material is suggested.
DOI: --
发表时间: 2003-03
期刊: --
影响因子: --
作者:
Y. Kivshar;G. Agrawal
通讯作者: Y. Kivshar;G. Agrawal
DOI: 10.1103/physrevlett.90.170404
发表时间: 2003-05-02
影响因子: 8.6
作者:
Liu, J;Wu, B;Niu, Q
通讯作者: Niu, Q
DOI: --
发表时间: 1995-07
期刊: --
影响因子: --
作者:
J. Joannopoulos;Steven G. Johnson;J. Winn;R. Meade
通讯作者: J. Joannopoulos;Steven G. Johnson;J. Winn;R. Meade
DOI: 10.1016/j.physleta.2005.03.038
发表时间: 2005-06-06
期刊: PHYSICS LETTERS A
影响因子: 2.6
作者:
Kevrekidis, PC;Chen, ZG;Weinstein, MI
通讯作者: Weinstein, MI
DOI: 10.1103/physreva.73.013601
发表时间: 2005-08
期刊: Physical Review A
影响因子: 2.9
作者:
Jie Liu;Chuanwei Zhang;M. Raizen;Q. Niu
通讯作者: Jie Liu;Chuanwei Zhang;M. Raizen;Q. Niu