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- W3131556886 abstract "We report the observation of low-energy, low-momenta collective oscillations of an exciton-polariton 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.Received 28 April 2020Revised 24 August 2020Accepted 28 January 2021DOI:https://doi.org/10.1103/PhysRevLett.126.075301© 2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasExciton polaritonQuantum fluids & solidsPhysical SystemsBose-Einstein condensatesPolariton condensateCondensed Matter, Materials & Applied Physics" @default.
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- W3131556886 date "2021-02-15" @default.
- W3131556886 modified "2023-10-11" @default.
- W3131556886 title "Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate" @default.
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- W3131556886 doi "https://doi.org/10.1103/physrevlett.126.075301" @default.
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