Quantum phase transition in an array of coupled dissipative cavities

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063840· OSTI ID:21550221

Ke, Liu; Chunhai, Lv ^[1]; Lei, Tan ^[1]; Wuming, Liu ^[2]

---

1. Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000 (China)
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

We study the features of superfluid and Mott-insulator states in a two-dimensional array of cavities with a two-level atom embedded in each cavity which is strongly coupled to the cavity field and immersed in a bosonic bath. Employing a different quasiboson approach, we show analytically how the dissipation and decoherence influence the quantum phase transitions from two aspects and find a localized tendency. For the superfluid state, a dynamical instability will lead to a sweeping to a localized state of photons. For the Mott-insulator state, a dissipation-induced fluctuation will suppress the restoring of long-range phase coherence driven by interaction.

• OSTI ID: 21550221
• Journal Information: Physical Review. A, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.063840; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
CAVITIES
FLUCTUATIONS
INSTABILITY
INTERACTIONS
PHASE TRANSFORMATIONS
PHOTONS
QUANTUM MECHANICS
SUPERFLUIDITY
TWO-DIMENSIONAL CALCULATIONS
BOSONS
ELEMENTARY PARTICLES
MASSLESS PARTICLES
MECHANICS
VARIATIONS