Amplitude-mode dynamics of polariton condensates
arXiv:1105.2227 · doi:10.1103/PhysRevLett.107.040401
Abstract
We study the stability of collective amplitude excitations in non-equilibrium polariton condensates. These excitations correspond to renormalized upper polaritons and to the collective amplitude modes of atomic gases and superconductors. They would be present following a quantum quench or could be created directly by resonant excitation. We show that uniform amplitude excitations are unstable to the production of excitations at finite wavevectors, leading to the formation of density-modulated phases. The physical processes causing the instabilities can be understood by analogy to optical parametric oscillators and the atomic Bose supernova.
4 pages, 2 figures
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Cited by in corpus (6)
- Quantum fluids of light
- Quantum quench phase diagrams of an s-wave BCS-BEC condensate
- Schwinger-Keldysh theory for Bose-Einstein condensation of photons in a dye-filled optical microcavity
- Direct observation of the quantum-fluctuation driven amplitude mode in a microcavity polariton condensate
- Higgs modes in two-dimensional spatially-indirect exciton condensates
- Collective terahertz fluctuation modes in a polariton laser