Numerical modeling of the central spin problem using the spin coherent states P-representation
Mesoscale and Nanoscale Physics
2009-11-11 v1 Statistical Mechanics
Abstract
In this work, we consider decoherence of a central spin by a spin bath. In order to study the non-perturbative decoherence regimes, we develop an efficient mean-field-based method for modeling the spin-bath decoherence, based on the P-representation of the central spin density matrix. The method can be applied to longitudinal and transversal relaxation at different external fields. In particular, by modeling large-size quantum systems (up to 16000 bath spins), we make controlled predictions for the slow long-time decoherence of the central spin.
Cite
@article{arxiv.cond-mat/0511681,
title = {Numerical modeling of the central spin problem using the spin coherent states P-representation},
author = {K. A. Al-Hassanieh and V. V. Dobrovitski and E. Dagotto and B. N. Harmon},
journal= {arXiv preprint arXiv:cond-mat/0511681},
year = {2009}
}
Comments
5 RevTeX pages, 4 color figures