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Article: Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
Title | Theory of electron spin decoherence by interacting nuclear spins in a quantum dot |
---|---|
Authors | |
Issue Date | 2006 |
Publisher | American 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, article no. 195301 How to Cite? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/175040 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Yao, W | en_US |
dc.contributor.author | Liu, RB | en_US |
dc.contributor.author | Sham, LJ | en_US |
dc.date.accessioned | 2012-11-26T08:48:54Z | - |
dc.date.available | 2012-11-26T08:48:54Z | - |
dc.date.issued | 2006 | en_US |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2006, v. 74 n. 19, article no. 195301 | - |
dc.identifier.issn | 1098-0121 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175040 | - |
dc.description.abstract | We 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.language | eng | en_US |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_US |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.title | Theory of electron spin decoherence by interacting nuclear spins in a quantum dot | en_US |
dc.type | Article | en_US |
dc.identifier.email | Yao, W: wangyao@hku.hk | en_US |
dc.identifier.authority | Yao, W=rp00827 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1103/PhysRevB.74.195301 | en_US |
dc.identifier.scopus | eid_2-s2.0-33750540375 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-33750540375&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 74 | en_US |
dc.identifier.issue | 19 | en_US |
dc.identifier.spage | article no. 195301 | - |
dc.identifier.epage | article no. 195301 | - |
dc.identifier.isi | WOS:000242409200077 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Yao, W=35141935300 | en_US |
dc.identifier.scopusauthorid | Liu, RB=8927912500 | en_US |
dc.identifier.scopusauthorid | Sham, LJ=7006555193 | en_US |
dc.identifier.citeulike | 7210994 | - |
dc.identifier.issnl | 1098-0121 | - |