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Decoherence and purity of a driven solid-state qubit in Ohmic bath

文献类型：期刊论文

作者Li, Zhi-Qiang; Liang, Xian-Ting1
刊名PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
出版日期2008-06-01
卷号40页码:2671-2676
关键词solid-state qubit decoherence master equation driven field
ISSN号1386-9477
DOI10.1016/j.physe.2007.12.003
英文摘要In this paper we study the decoherence and purity of a driven solid-state qubit in the Ohmic bath by using the method based on the master equation. At first, instead of solving the master equation we investigate the coefficients of the equation which describe the shift in frequency, diffusive, decoherence, and so on. It is shown that one of the coefficients (we called it decoherence coefficient) is crucial to the decoherence of the qubit in the model. Then we investigate the evolution of the purity of the state in the model. From the analysis of the purity we see that the decoherence time of the qubit decreases with the increase in the amplitude of the driven fields and it increases with the increase in the frequency of the driven fields. (C) 2007 Elsevier B.V. All rights reserved.
WOS关键词MACROSCOPIC QUANTUM STATES ; FLUX QUBIT ; DYNAMICS ; ENVIRONMENT ; SUPERPOSITION
WOS研究方向Science & Technology - Other Topics ; Physics
语种英语
WOS记录号WOS:000257221600005
出版者ELSEVIER SCIENCE BV
源URL[http://119.78.100.186/handle/113462/28554]  
专题中国科学院近代物理研究所
通讯作者Liang, Xian-Ting
作者单位1.Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China
2.Ningbo Univ, Inst Modern Phys, Ningbo 315211, Zhejiang, Peoples R China
推荐引用方式
GB/T 7714		 Li, Zhi-Qiang,Liang, Xian-Ting. Decoherence and purity of a driven solid-state qubit in Ohmic bath[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2008,40:2671-2676.
APA Li, Zhi-Qiang,&Liang, Xian-Ting.(2008).Decoherence and purity of a driven solid-state qubit in Ohmic bath.PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,40,2671-2676.
MLA Li, Zhi-Qiang,et al."Decoherence and purity of a driven solid-state qubit in Ohmic bath".PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 40(2008):2671-2676.

入库方式： OAI收割

来源：近代物理研究所

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