Strong coupling theory for the Jaynes-Cummings-Hubbard model
Other Condensed Matter
2009-09-01 v2
Abstract
We present an analytic strong-coupling approach to the phase diagram and elementary excitations of the Jaynes-Cummings-Hubbard model describing a superfluid-insulator transition of polaritons in an array of coupled QED cavities. In the Mott phase, we find four modes corresponding to particle/hole excitations with lower and upper polaritons, respectively. Simple formulas are derived for the dispersion relation and spectral weights within a strong-coupling random-phase approximation (RPA). The phase boundary is calculated beyond RPA by including the leading correction due to quantum fluctuations.
Cite
@article{arxiv.0905.3344,
title = {Strong coupling theory for the Jaynes-Cummings-Hubbard model},
author = {S. Schmidt and G. Blatter},
journal= {arXiv preprint arXiv:0905.3344},
year = {2009}
}
Comments
4 pages, 3 figures, minor changes, final version accepted for publication in PRL