Creation of entanglement between two electron spins induced by many spin ensemble excitations

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	Creation of entanglement between two electron spins induced by many spin ensemble excitations
	Ai, Q , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China; Ai, Q.; Li, Y.; Sun, C. P.; Long, G. L.
刊名	EUROPEAN PHYSICAL JOURNAL D
	2008
卷号	48 期号:2 页码:293-300
关键词	Radiation-pressure Quantum Dots Micromirror Resonator
ISSN号	1434-6060
英文摘要	We theoretically explore the possibility of creating spin entanglement by simultaneously coupling two electronic spins to a nuclear ensemble. By microscopically modeling the spin ensemble as a single mode boson field, we use the time-dependent Frohlich transformation (TDFT) method developed recently [Y. Li, C. Bruder, C.P. Sun, Phys. Rev. A 75, 032302 (2007)] to calculate the effective coupling between the two spins. Our investigation shows that the total system realizes a solid state based architecture for cavity QED. Exchanging such kind of effective boson in a virtual process can result in an effective interaction between two spins. It is discovered that a maximum entangled state can be obtained when the velocity of the electrons matches the initial distance between them in a suitable way. Moreover, we also study how the number of collective excitations influences the entanglement. It is shown that the larger the number of excitation is, the less the two spins entangle each other.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000256663500017
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5511]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Ai, Q , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Ai, Q , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China,Ai, Q.,Li, Y.,et al. Creation of entanglement between two electron spins induced by many spin ensemble excitations[J]. EUROPEAN PHYSICAL JOURNAL D,2008,48(2):293-300.
APA	Ai, Q , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China,Ai, Q.,Li, Y.,Sun, C. P.,&Long, G. L..(2008).Creation of entanglement between two electron spins induced by many spin ensemble excitations.EUROPEAN PHYSICAL JOURNAL D,48(2),293-300.
MLA	Ai, Q , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China,et al."Creation of entanglement between two electron spins induced by many spin ensemble excitations".EUROPEAN PHYSICAL JOURNAL D 48.2(2008):293-300.