Detuning effect in quantum dynamics of a strongly coupled single quantum dot-cavity system

被引：11
|
作者：
Xue, Jiao [1 ]
Zhu, Ka-Di [1 ]
Zheng, Hang [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 32期
关键词：
D O I：
10.1088/0953-8984/20/32/325209
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The quantum dynamics of a strongly coupled single quantum dot-cavity system with non-zero detuning in a phonon bath is investigated theoretically in terms of a perturbation treatment based on a unitary transformation and an operator displacement. The decoherence due to phonons as a function of the detuning between the cavity mode and exciton is obtained analytically. It is shown that the detuning has a significant impact on the quantum dot exciton lifetime. In realistic experimental conditions, the calculated exciton lifetimes are in good agreement with recent experimental observation (Hennessy et al 2007 Nature 445 896).
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页数：7
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