Dynamics of interacting Dicke model in a coupled-cavity array

Fazal Badshah*, Shahid Qamar, Mauro Paternostro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
447 Downloads (Pure)

Abstract

We consider the dynamics of an array of mutually interacting cavities, each containing an ensemble of N two-level atoms. By exploring the possibilities offered by ensembles of various dimensions and a range of atom-light and photon-hopping values, we investigate the generation of multisite entanglement, as well as the performance of excitation transfer across the array, resulting from the competition between on-site nonlinearities of the matter-light interaction and intersite photon hopping. In particular, for a three-cavity interacting system it is observed that the initial excitation in the first cavity completely transfers to the ensemble in the third cavity through the hopping of photons between the adjacent cavities. Probabilities of the transfer of excitation of the cavity modes and ensembles exhibit characteristics of fast and slow oscillations governed by coupling and hopping parameters, respectively. In the large-hopping case, by seeding an initial excitation in the cavity at the center of the array, a tripartite W state, as well as a bipartite maximally entangled state, is obtained, depending on the interaction time. Population of the ensemble in a cavity has a positive impact on the rate of excitation transfer between the ensembles and their local cavity modes. In particular, for ensembles of five to seven atoms, tripartite W states can be produced even when the hopping rate is comparable to the cavity-atom coupling rate. A similar behavior of the transfer of excitation is observed for a four-coupled-cavity system with two initial excitations.
Original languageEnglish
Article number033813
Number of pages8
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume90
Issue number3
DOIs
Publication statusPublished - 14 Sep 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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