Dynamics and decoherence in the central spin model using exact methods
Strongly Correlated Electrons
2010-10-22 v3 Disordered Systems and Neural Networks
Mesoscale and Nanoscale Physics
Quantum Physics
Abstract
The dynamics and decoherence of an electronic spin-1/2 qubit coupled to a bath of nuclear spins via hyperfine interactions in a quantum dot is studied. We show how exact results from the integrable solution can be used to understand the dynamic behavior of the qubit. It is possible to predict the main frequency contributions and their broadening for relatively general initial states analytically, leading to an estimate of the corresponding decay times. Furthermore, for a small bath polarization, a new low-frequency time scale is observed.
Cite
@article{arxiv.1005.0001,
title = {Dynamics and decoherence in the central spin model using exact methods},
author = {Michael Bortz and Sebastian Eggert and Christian Schneider and Robert Stubner and Joachim Stolze},
journal= {arXiv preprint arXiv:1005.0001},
year = {2010}
}
Comments
4 pages, 2 figures. Published version. See also http://www.physik.uni-kl.de/eggert/papers/index.html