Amplitude-mode dynamics of polariton condensates
We study the stability of collective amplitude excitations in nonequilibrium 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 cr...
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| Veröffentlicht in: | Physical review letters 2011-07, Vol.107 (4), p.040401-040401, Article 040401 |
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| container_title | Physical review letters |
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| creator | Brierley, R T Littlewood, P B Eastham, P R |
| description | We study the stability of collective amplitude excitations in nonequilibrium 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 wave vectors, 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. |
| doi_str_mv | 10.1103/PhysRevLett.107.040401 |
| format | Article |
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| title | Amplitude-mode dynamics of polariton condensates |
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