Accurate numerical solution to the finite-size Dicke model
Quantum Physics
2009-11-13 v2
Abstract
By using extended bosonic coherent states, a new technique to solve the Dicke model exactly is proposed in the numerical sense. The accessible system size is two orders of magnitude higher than that reported in literature. Finite-size scaling for several observables, such as the ground-state energy, Berry phase, and concurrence are analyzed. The existing discrepancy for the scaling exponent of the concurrence is reconciled.
Cite
@article{arxiv.0809.4385,
title = {Accurate numerical solution to the finite-size Dicke model},
author = {Qing-Hu Chen and Yu-Yu Zhang and Tao Liu and Ke-Lin Wang},
journal= {arXiv preprint arXiv:0809.4385},
year = {2009}
}
Comments
4 pages, 5 figures. Phys. Rev. A (in press, a Rapid Communication)