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Article: Theory of electron spin decoherence by interacting nuclear spins in a quantum dot

TitleTheory of electron spin decoherence by interacting nuclear spins in a quantum dot
Authors
Issue Date2006
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2006, v. 74 n. 19 How to Cite?
AbstractWe present a quantum solution to the electron spin decoherence by a nuclear pair-correlation method for the electron-nuclear spin dynamics under a strong magnetic field and a temperature high for the nuclear spins but low for the electron. The theory incorporates the hyperfine interaction, the intrinsic (both direct and indirect) nuclear interactions, and the extrinsic nuclear coupling mediated by the hyperfine interaction with the single electron in question. The last is shown to be important in free-induction decay (FID) of the single electron spin coherence. The spin-echo eliminates the hyperfine-mediated decoherence but only reduces the decoherence by the intrinsic nuclear interactions. Thus, the decoherence times for single spin FID and ensemble spin-echo are significantly different. The decoherence is explained in terms of quantum entanglement, which involves more than the spectral diffusion. © 2006 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175040
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYao, Wen_US
dc.contributor.authorLiu, RBen_US
dc.contributor.authorSham, LJen_US
dc.date.accessioned2012-11-26T08:48:54Z-
dc.date.available2012-11-26T08:48:54Z-
dc.date.issued2006en_US
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2006, v. 74 n. 19en_US
dc.identifier.issn1098-0121en_US
dc.identifier.urihttp://hdl.handle.net/10722/175040-
dc.description.abstractWe present a quantum solution to the electron spin decoherence by a nuclear pair-correlation method for the electron-nuclear spin dynamics under a strong magnetic field and a temperature high for the nuclear spins but low for the electron. The theory incorporates the hyperfine interaction, the intrinsic (both direct and indirect) nuclear interactions, and the extrinsic nuclear coupling mediated by the hyperfine interaction with the single electron in question. The last is shown to be important in free-induction decay (FID) of the single electron spin coherence. The spin-echo eliminates the hyperfine-mediated decoherence but only reduces the decoherence by the intrinsic nuclear interactions. Thus, the decoherence times for single spin FID and ensemble spin-echo are significantly different. The decoherence is explained in terms of quantum entanglement, which involves more than the spectral diffusion. © 2006 The American Physical Society.en_US
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_US
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_US
dc.titleTheory of electron spin decoherence by interacting nuclear spins in a quantum doten_US
dc.typeArticleen_US
dc.identifier.emailYao, W: wangyao@hku.hken_US
dc.identifier.authorityYao, W=rp00827en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1103/PhysRevB.74.195301en_US
dc.identifier.scopuseid_2-s2.0-33750540375en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33750540375&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume74en_US
dc.identifier.issue19en_US
dc.identifier.isiWOS:000242409200077-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridYao, W=35141935300en_US
dc.identifier.scopusauthoridLiu, RB=8927912500en_US
dc.identifier.scopusauthoridSham, LJ=7006555193en_US
dc.identifier.citeulike7210994-

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