Nuclear spin dynamics in double quantum dots: Fixed points, transients, and intermittency
Name
Levitov-2011-Nuclear spin dynamics in double quantum.pdf
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581.61 KB
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Checksum (MD5)
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Author(s)
Rudner, M. S.
Koppens, Frank Henricus Louis
Folk, J. A.
Vandersypen, L. M. K.
Levitov, Leonid
Date Issued
August 2011
Journal
Physical Review B
Publisher
American Physical Society
Citation
Rudner, M. et al. “Nuclear spin dynamics in double quantum dots: Fixed points, transients, and intermittency.” Physical Review B 84 (2011): n. pag. Web. 17 Nov. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
Transport through spin-blockaded quantum dots provides a means for electrical control and detection of nuclear spin dynamics in the host material. Although such experiments have become increasingly popular in recent years, interpretation of their results in terms of the underlying nuclear spin dynamics remains challenging. Here we examine nuclear polarization dynamics within a two-polarization model that supports a wide range of nonlinear phenomena. We point out a fundamental process in which nuclear spin dynamics can be driven by electron shot noise; fast electric current fluctuations generate much slower nuclear polarization dynamics, which in turn affect electron dynamics via the Overhauser field. The resulting intermittent, extremely slow current fluctuations account for a variety of observed phenomena that were not previously understood.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.84.075339
