Signatures of the superfluid-insulator phase transition in laser-driven dissipative nonlinear cavity arrays

Year: 2010

Authors: Tomadin A., Giovannetti V., Fazio R., Gerace D., Carusotto I., Türeci H.E., Imamoglu A.

Autors Affiliation: National Enterprise for nanoScience and nanoTechnology, Consiglio Nazionale delle Ricerche, Istituto Nazionale per la Fisica della Materia, and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy;
Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia and Dipartimento di Fisica “A. Volta,” Universita’ di Pavia, I-27100 Pavia, Italy;
Institute for Quantum Electronics, Eidgenössische Technische Hochschule Zürich, CH-8093 Zurich, Switzerland;
Istituto Nazionale di Ottica-Consiglio Nazionale delle Ricerche BEC Center and Dipartimento di Fisica, Università di Trento, I-38123 Povo, Italy

Abstract: We analyze the nonequilibrium dynamics of a gas of interacting photons in an array of coupled dissipative
nonlinear cavities when driven by a pulsed external coherent field. Using a mean-field approach, we show that
the response of the system is strongly sensitive to the underlying (equilibrium) quantum phase transition from
a Mott insulator to a superfluid state at commensurate filling. We find that the coherence of the cavity emission
after a quantum quench can be used to determine the phase diagram of an optical many-body system even in the
presence of dissipation.

Journal/Review: PHYSICAL REVIEW A

Volume: 81 (6)      Pages from: 61801-1  to: 61801-4

More Information: We acknowledge useful discussions with Sebastian Schmidt. This work was supported by EUIP-EuroSQIP (RF), the Swiss NSF under Grant No. PP00P2-123519/1 (HET) and an ERC Advanced Investigator Grant (AI).
KeyWords: Quantum; Polaritons; States
DOI: 10.1103/PhysRevA.81.061801

Citations: 109
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