Phase diagram of a QED-cavity array coupled via a N-type level scheme
Quantum Physics
2015-03-12 v1
Abstract
We study the zero-temperature phase diagram of a one-dimensional array of QED cavities where, besides the single-photon hopping, an additional coupling between neighboring cavities is mediated by an N-type four-level system. By varying the relative strength of the various couplings, the array is shown to exhibit a variety of quantum phases including a polaritonic Mott insulator, a density-wave and a superfluid phase. Our results have been obtained by means of numerical density-matrix renormalization group calculations. The phase diagram was obtained by analyzing the energy gaps for the polaritons, as well as through a study of two-point correlation functions.
Cite
@article{arxiv.1503.03146,
title = {Phase diagram of a QED-cavity array coupled via a N-type level scheme},
author = {Jiasen Jin and Rosario Fazio and Davide Rossini},
journal= {arXiv preprint arXiv:1503.03146},
year = {2015}
}
Comments
12 pages, 6 figures; EPJ Quantum Technology 2015, 2:5