Non-Markovian entanglement dynamics in coupled superconducting qubit systems

doi:10.1140/epjd/e2010-00175-7

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	Non-Markovian entanglement dynamics in coupled superconducting qubit systems
	Cui, W.1,2; Xi, Z. R.1 ; Pan, Y.1,2
	2010-09-01
发表期刊	EUROPEAN PHYSICAL JOURNAL D
ISSN	1434-6060
卷号	59 期号:3 页码:479-485
摘要	We theoretically analyze the entanglement generation and dynamics by coupled Josephson junction qubits. Considering a current-biased Josephson junction (CBJJ), we generate maximally entangled states. In particular, the entanglement dynamics is considered as a function of the decoherence parameters, such as the temperature, the ratio r equivalent to omega(c)/omega(0) between the reservoir cutoff frequency omega(c) and the system oscillator frequency omega(0), and the energy levels split of the superconducting circuits in the non-Markovian master equation. We analyzed the entanglement sudden death (ESD) and entanglement sudden birth (ESB) by the non-Markovian master equation. Furthermore, we find that the larger the ratio r and the thermal energy k(B)T, the shorter the decoherence. In this superconducting qubit system we find that the entanglement can be controlled and the ESD time can be prolonged by adjusting the temperature and the superconducting phases Phi(k) which split the energy levels.
DOI	10.1140/epjd/e2010-00175-7
语种	英语
资助项目	National Natural Science Foundation of China[60774099] ; National Natural Science Foundation of China[60821091] ; Chinese Academy of Sciences[KJCX3-SYW-S01] ; CAS
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000280948200019
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/9568
专题	系统科学研究所
通讯作者	Cui, W.
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, Inst Syst Sci, Key Lab Syst & Control, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Cui, W.,Xi, Z. R.,Pan, Y.. Non-Markovian entanglement dynamics in coupled superconducting qubit systems[J]. EUROPEAN PHYSICAL JOURNAL D,2010,59(3):479-485.
APA	Cui, W.,Xi, Z. R.,&Pan, Y..(2010).Non-Markovian entanglement dynamics in coupled superconducting qubit systems.EUROPEAN PHYSICAL JOURNAL D,59(3),479-485.
MLA	Cui, W.,et al."Non-Markovian entanglement dynamics in coupled superconducting qubit systems".EUROPEAN PHYSICAL JOURNAL D 59.3(2010):479-485.