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题名: Spin entanglement induced by spin-orbit interactions in coupled quantum dots
作者: Zhao, Nan ;  Zhong, L. ;  Zhu, Jia-Lin ;  Sun, C. P.
刊名: PHYSICAL REVIEW B
出版日期: 2006
卷号: 74, 期号:7, 页码:-
关键词: ELECTRONS
学科分类: Physics
通讯作者: Zhao, N , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
部门归属: Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We theoretically explore the possibility of creating spin quantum entanglement in a system of two electrons confined respectively in two vertically coupled quantum dots in the presence of Rashba-type spin-orbit coupling. We find that the system can be described by a generalized Jaynes-Cummings model of two-mode bosons interacting with two spins. The lower excited states of this model are calculated to reveal the underlying physics of the far-infrared absorption spectra. The analytic perturbation approach shows that an effective transverse coupling of spins can be obtained by eliminating the orbital degrees of freedom in the large-detuning limit. Here, the orbital degrees of freedom of the two electrons, which are described by two-mode bosons, serve as a quantized data bus to exchange the quantum information between the two electron spins. Then a nontrivial two-qubit logic gate is realized and spin entanglement between the two electrons is created by virtue of spin-orbit interactions.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000240238800058
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5931
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhao, Nan,Zhong, L.,Zhu, Jia-Lin,et al. Spin entanglement induced by spin-orbit interactions in coupled quantum dots[J]. PHYSICAL REVIEW B,2006,74(7):-.
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