Quantum dynamics of Bose-Einstein condensates in tilted and driven bichromatic optical lattices

被引：24
|
作者：
Witthaut, D. [1 ,2 ,3 ]
Trimborn, F. [3 ,4 ]
Kegel, V. [3 ]
Korsch, H. J. [3 ]
机构：
[1] Max Planck Inst Dynam & Self Org, Network Dynam Grp, D-37073 Gottingen, Germany
[2] Univ Copenhagen, QUANTOP, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[3] Tech Univ Kaiserslautern, Fachbereich Phys, D-67663 Kaiserslautern, Germany
[4] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany
来源：
PHYSICAL REVIEW A | 2011年 / 83卷 / 01期
关键词：
ATOMS;
D O I：
10.1103/PhysRevA.83.013609
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study the dynamics of Bose-Einstein condensates in tilted and driven optical superlattices. For a bichromatic lattice, each Bloch band splits up into two minibands such that the dynamics is governed by the interplay of Bloch oscillations and transitions between the bands. Thus, bichromatic potentials provide an excellent model system for the study of nonlinear Landau-Zener tunneling, and they allow for a variety of applications in matter-wave interferometry and quantum metrology. In the present paper, we investigate the coherent dynamics of an interacting Bose-Einstein condensate as well as its stability. Different mechanisms of instability are discussed, which lead to a rapid depletion of the condensate.
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页数：8
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