Quantum versus classical hyperfine-induced dynamics in a quantum dot

W. A. Coish, Daniel Loss, E. A. Yuzbashyan, B. L. Altshuler

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31 Scopus citations


In this article we analyze spin dynamics for electrons confined to semiconductor quantum dots due to the contact hyperfine interaction. We compare mean-field (classical) evolution of an electron spin in the presence of a nuclear field with the exact quantum evolution for the special case of uniform hyperfine coupling constants. We find that (in this special case) the zero-magnetic-field dynamics due to the mean-field approximation and quantum evolution are similar. However, in a finite magnetic field, the quantum and classical solutions agree only up to a certain time scale t< τc, after which they differ markedly.

Original languageEnglish (US)
Article number081715
JournalJournal of Applied Physics
Issue number8
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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