Quantum versus classical hyperfine-induced dynamics in a quantum dot
摘要
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<\tau_c, after which they differ markedly.
引用
@article{arxiv.cond-mat/0610633,
title = {Quantum versus classical hyperfine-induced dynamics in a quantum dot},
author = {W. A. Coish and E. A. Yuzbashyan and B. L. Altshuler and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0610633},
year = {2007}
}
备注
6 pages, 1 figure, accepted for publication in the Journal of Applied Physics (ICPS06 conference proceedings); v2: updated references, final published version