Decoherence of Josephson charge qubit in non-Markovian environment

被引：1
|
作者：
Qiu, Qing-Qian
Zhou, Xing-Fei
Liang, Xian-Ting [1 ]
机构：
[1] Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2016年 / 489卷
关键词：
Decoherence; Non-Markov; Josephson charge qubit; Time-nonlocal dynamics; MACROSCOPIC QUANTUM STATES; COOPER-PAIR BOX; DISSIPATIVE SYSTEMS; LONG-TIME; DYNAMICS; JUNCTION; OSCILLATIONS; EVOLUTION;
D O I：
10.1016/j.physb.2016.02.024
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper we investigate the decoherence of Josephson charge qubit (JCQ) by using a time-nonlocal (TNL) dynamical method. Three kinds of environmental models, described with Ohmic, super-Ohmic, and sub-Ohmic spectral density functions are considered. It is shown that the TNL method can effectively include the non-Markovian effects in the dynamical solutions. In particular, it is shown that the sub Ohmic environment has longer correlation time than the Ohmic and super-Ohmic ones. And the Markovian and non-Markovian dynamics are obviously different for the qubit in sub-Ohmic environment. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：12 / 16
页数：5
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