Excitations in a Nonequilibrium Bose-Einstein Condensate of Exciton Polaritons

Journal Article · Fri Oct 05 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.140402· OSTI ID:21024222

Wouters, Michiel ^[1]; Carusotto, Iacopo ^[2]

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1. TFVS, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerpen (Belgium)
2. BEC-CNR-INFM and Dipartimento di Fisica, Universita di Trento, I-38050 Povo (Italy)

We develop a mean-field theory of the dynamics of a nonequilibrium Bose-Einstein condensate of exciton polaritons in a semiconductor microcavity. The spectrum of elementary excitations around the stationary state is analytically studied by means of a generalized Gross-Pitaevskii equation. A diffusive behavior of the Goldstone mode is found in the spatially homogeneous case and new features are predicted for the Josephson effect in a two-well geometry.

• OSTI ID: 21024222
• Journal Information: Physical Review Letters, Vol. 99, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.99.140402; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
EQUATIONS
EXCITATION
EXCITONS
GEOMETRY
JOSEPHSON EFFECT
MEAN-FIELD THEORY
POLARONS
SEMICONDUCTOR MATERIALS
SPECTRA