Low-energy collective oscillations and Bogoliubov sound in an exciton-polariton condensate
arXiv:2004.12339 · doi:10.1103/PhysRevLett.126.075301
Abstract
We report the observation of low-energy, low-momenta collective oscillations of an excitonpolariton condensate in a round "box" trap. The oscillations are dominated by the dipole and breathing modes, and the ratio of the frequencies of the two modes is consistent with that of a weakly interacting two-dimensional trapped Bose gas. The speed of sound extracted from the dipole oscillation frequency is smaller than the Bogoliubov sound, which can be partly explained by the influence of the incoherent reservoir. These results pave the way for understanding the effects of reservoir, dissipation, energy relaxation, and finite temperature on the superfluid properties of exciton-polariton condensates and other two-dimensional open-dissipative quantum fluids.
13 pages, 15 figures
References in corpus (12)
- Quantum fluids of light
- Observation of Superfluidity of Polaritons in Semiconductor Microcavities
- Exciton-polariton condensates
- Excitations in a non-equilibrium Bose-Einstein condensate of exciton-polaritons
- Excitation spectrum of a trapped dipolar supersolid and its experimental evidence
- Propagation and amplification dynamics of 1D polariton condensates
- Dynamics and stability of dark solitons in exciton-polariton condensates
- BCS-BEC crossover in a system of microcavity polaritons
- Polariton condensation with localised excitons and propagating photons
- A BCS wavefunction approach to the BEC-BCS crossover of exciton-polariton condensates
- Sound propagation and quantum limited damping in a two-dimensional Fermi gas
- Imaging the collective excitations of an ultracold gas using statistical correlations
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- Narrow-linewidth exciton-polariton laser
- Coherence of a non-equilibrium polariton condensate across the interaction-mediated phase transition
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- Quantum theory of polariton weak lasing and polarization bifurcations