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Ding, WK; Shi, AQ; You, JQ; Zhang, WX; Zhang, WX (reprint author), Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China.
High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot
Source PublicationPHYSICAL REVIEW B
Language英语
KeywordSpin Electron Field
AbstractWe 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.
2014
ISSN1098-0121
Volume90Issue:23Pages:235421
Subject AreaPhysics
DOI10.1103/PhysRevB.90.235421
Indexed BySCI
Funding OrganizationNational 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 ; 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 ; 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 ; 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
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15543
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZhang, WX (reprint author), Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China.
Recommended Citation
GB/T 7714
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.
APA Ding, WK,Shi, AQ,You, JQ,Zhang, WX,&Zhang, WX .(2014).High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot.PHYSICAL REVIEW B,90(23),235421.
MLA Ding, WK,et al."High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot".PHYSICAL REVIEW B 90.23(2014):235421.
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