Electron-nuclear dynamics in a quantum dot under non-unitary electron control
Mesoscale and Nanoscale Physics
2011-07-21 v2 Quantum Physics
Abstract
We introduce a method for solving the problem of an externally controlled electron spin in a quantum dot interacting with host nuclei via the hyperfine interaction. Our method accounts for generalized (non-unitary) evolution effected by external controls and the environment, such as coherent lasers combined with spontaneous emission. As a concrete example we develop the microscopic theory of the dynamics of nuclear-induced frequency focusing, as first measured in Science 317, 1896 (2007); we find that the nuclear relaxation rates are several orders of magnitude faster than those quoted in that work.
Cite
@article{arxiv.1101.4422,
title = {Electron-nuclear dynamics in a quantum dot under non-unitary electron control},
author = {Edwin Barnes and Sophia E. Economou},
journal= {arXiv preprint arXiv:1101.4422},
year = {2011}
}
Comments
To appear in Phys. Rev. Lett