Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate

E. Estrecho; M. Pieczarka; M. Wurdack; M. Steger; K. West; L. N. Pfeiffer; D. W. Snoke; A. G. Truscott; E. A. Ostrovskaya

doi:10.1103/PhysRevLett.126.075301

Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate

E. Estrecho^*, M. Pieczarka, M. Wurdack, M. Steger, K. West, L. N. Pfeiffer, D. W. Snoke, A. G. Truscott, E. A. Ostrovskaya^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

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.

Original language	English
Article number	075301
Journal	Physical Review Letters
Volume	126
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.126.075301
Publication status	Published - 15 Feb 2021

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title = "Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate",

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.",

author = "E. Estrecho and M. Pieczarka and M. Wurdack and M. Steger and K. West and Pfeiffer, {L. N.} and Snoke, {D. W.} and Truscott, {A. G.} and Ostrovskaya, {E. A.}",

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doi = "10.1103/PhysRevLett.126.075301",

language = "English",

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T1 - Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate

AU - Estrecho, E.

AU - Pieczarka, M.

AU - Wurdack, M.

AU - Steger, M.

AU - West, K.

AU - Pfeiffer, L. N.

AU - Snoke, D. W.

AU - Truscott, A. G.

AU - Ostrovskaya, E. A.

PY - 2021/2/15

Y1 - 2021/2/15

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevLett.126.075301

DO - 10.1103/PhysRevLett.126.075301

M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

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ER -

Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate

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