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Spin entanglement induced by spin-orbit interactions in coupled quantum dots
Zhao, Nan; Zhong, L.; Zhu, Jia-Lin; Sun, C. P.; Zhao, N , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
2006
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号74期号:7页码:-
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.
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
关键词Electrons
学科领域Physics
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收录类别SCI
WOS记录号WOS:000240238800058
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被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5931
专题理论物理所1978-2010年知识产出
通讯作者Zhao, N , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
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GB/T 7714
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):-.
APA Zhao, Nan,Zhong, L.,Zhu, Jia-Lin,Sun, C. P.,&Zhao, N , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.(2006).Spin entanglement induced by spin-orbit interactions in coupled quantum dots.PHYSICAL REVIEW B,74(7),-.
MLA Zhao, Nan,et al."Spin entanglement induced by spin-orbit interactions in coupled quantum dots".PHYSICAL REVIEW B 74.7(2006):-.
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