Disorder effects on the quantum coherence of a many-boson system
Disorder effects on the quantum coherence of a many-boson system
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无序对多玻色子系统量子相干性的影响
DOI：
10.1103/physreva.85.033617
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发表时间：
2012-01
影响因子：
2.9
通讯作者：
杨师杰
中科院分区：
文献类型：
--
作者：
杨师杰
在双势垒模型中研究了无序对多玻色子量子相干性的影响。对于基态，无序增强了量子相干性。在深Mott区，动力学演化揭示了量子相干性的周期性崩塌和复苏，量子相干性对无序是健壮的。场内能量和相互作用的平均变化揭示了时间演化中相干-退相干振荡的拍频现象。
The effects of disorders on the quantum coherence for many-bosons are studied in a double well model. For the ground state, the disorder enhances the quantum coherence. In the deep Mott regime, dynamical evolution reveals periodical collapses and revivals of the quantum coherence which is robust against the disorder. The average over variations in both the on-site energy and the interaction reveals a beat phenomenon of the coherence-decoherence oscillation in the temporal evolution.