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Chesi, S; Wang, YD; Yoneda, J; Otsuka, T; Tarucha, S; Loss, D; Chesi, S (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
Single-spin manipulation in a double quantum dot in the field of a micromagnet
Source PublicationPHYSICAL REVIEW B
Language英语
KeywordElectron Spins Computation Qubit
AbstractThe manipulation of single spins in double quantum dots by making use of the exchange interaction and a highly inhomogeneous magnetic field was discussed in Coish and Loss [Phys. Rev. B 75, 161302 (2007)]. However, such large inhomogeneity is difficult to achieve through the slanting field of a micromagnet in current designs of lateral double dots. Therefore, we examine an analogous spin manipulation scheme directly applicable to realistic GaAs double dot setups. We estimate that typical gate times, realized at the singlet-triplet anticrossing induced by the inhomogeneous micromagnet field, can be a few nanoseconds. We discuss the optimization of initialization, read-out, and single-spin gates through suitable choices of detuning pulses and an improved geometry. We also examine the effect of nuclear dephasing and charge noise. The latter induces fluctuations of both detuning and tunneling amplitude. Our results suggest that this scheme is a promising approach for the realization of fast single-spin operations.
2014
ISSN1098-0121
Volume90Issue:23Pages:235311
Subject AreaPhysics
DOI10.1103/PhysRevB.90.235311
Indexed BySCI
Funding OrganizationIARPA project "Multi-Qubit Coherent Operations" through Copenhagen University; 1000 Youth Fellowship Program of China; ImPACT Program of Council for Science Technology and Innovation (Cabinet Office, Government of Japan); FIRST; Japan Prize Foundation; JSPS; RIKEN incentive project; Yazaki Memorial Foundation; Swiss NSF; NCCR QSIT; [26220710] ; IARPA project "Multi-Qubit Coherent Operations" through Copenhagen University; 1000 Youth Fellowship Program of China; ImPACT Program of Council for Science Technology and Innovation (Cabinet Office, Government of Japan); FIRST; Japan Prize Foundation; JSPS; RIKEN incentive project; Yazaki Memorial Foundation; Swiss NSF; NCCR QSIT; [26220710] ; IARPA project "Multi-Qubit Coherent Operations" through Copenhagen University; 1000 Youth Fellowship Program of China; ImPACT Program of Council for Science Technology and Innovation (Cabinet Office, Government of Japan); FIRST; Japan Prize Foundation; JSPS; RIKEN incentive project; Yazaki Memorial Foundation; Swiss NSF; NCCR QSIT; [26220710] ; IARPA project "Multi-Qubit Coherent Operations" through Copenhagen University; 1000 Youth Fellowship Program of China; ImPACT Program of Council for Science Technology and Innovation (Cabinet Office, Government of Japan); FIRST; Japan Prize Foundation; JSPS; RIKEN incentive project; Yazaki Memorial Foundation; Swiss NSF; NCCR QSIT; [26220710]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15539
Collection理论物理所科研产出_SCI论文
Corresponding AuthorChesi, S (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Chesi, S,Wang, YD,Yoneda, J,et al. Single-spin manipulation in a double quantum dot in the field of a micromagnet[J]. PHYSICAL REVIEW B,2014,90(23):235311.
APA Chesi, S.,Wang, YD.,Yoneda, J.,Otsuka, T.,Tarucha, S.,...&Chesi, S .(2014).Single-spin manipulation in a double quantum dot in the field of a micromagnet.PHYSICAL REVIEW B,90(23),235311.
MLA Chesi, S,et al."Single-spin manipulation in a double quantum dot in the field of a micromagnet".PHYSICAL REVIEW B 90.23(2014):235311.
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