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题名: High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot
作者: Ding, WK ;  Shi, AQ ;  You, JQ ;  Zhang, WX
刊名: PHYSICAL REVIEW B
出版日期: 2014
卷号: 90, 期号:23, 页码:235421
关键词: SPIN ;  ELECTRON ;  FIELD
学科分类: Physics
DOI: 10.1103/PhysRevB.90.235421
通讯作者: Zhang, WX (reprint author), Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China.
部门归属: [Ding, Wenkui
英文摘要: We numerically investigate the encoding and retrieval processes for quantum memory realized in a semiconductor quantum dot by focusing on the effect of inhomogeneously polarized nuclear spins whose polarization depends on the local hyperfine coupling strength. We find that the performance of quantum memory is significantly improved by inhomogeneous nuclear polarization, as compared with homogeneous nuclear polarization. Moreover, the narrower the nuclear polarization distribution is, the better is the performance of the quantum memory. We ascribe the improvement in performance to the full harnessing of the highly polarized and strongly coupled nuclear spins by carefully studying the entropy change of individual nuclear spins during the encoding process. Our results shed light on the implementation of quantum memory in a quantum dot.
资助者: National Basic Research Program of China [2013CB922003, 2014CB921401]; National Natural Science Foundation of China [11275139, 91121015]; NSAF Grant [U1330201]; Fundamental Research Funds for the Central Universities
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000346374900005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15543
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Ding, WK,Shi, AQ,You, JQ,et al. High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot[J]. PHYSICAL REVIEW B,2014,90(23):235421.
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