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Analogue cosmological particle creation in an ultracold quantum fluid of light

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  • Jeff Steinhauer

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France
    Technion—Israel Institute of Technology, Technion City)

  • Murad Abuzarli

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Tangui Aladjidi

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Tom Bienaimé

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Clara Piekarski

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Wei Liu

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Elisabeth Giacobino

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Alberto Bramati

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

  • Quentin Glorieux

    (Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France)

Abstract

The rapid expansion of the early universe resulted in the spontaneous production of cosmological particles from vacuum fluctuations, some of which are observable today in the cosmic microwave background anisotropy. The analogue of cosmological particle creation in a quantum fluid was proposed, but the quantum, spontaneous effect due to vacuum fluctuations has not yet been observed. Here we report the spontaneous creation of analogue cosmological particles in the laboratory, using a quenched 3-dimensional quantum fluid of light. We observe acoustic peaks in the density power spectrum, in close quantitative agreement with the quantum-field theoretical prediction. We find that the long-wavelength particles provide a window to early times. This work introduces the quantum fluid of light, as cold as an atomic Bose-Einstein condensate.

Suggested Citation

  • Jeff Steinhauer & Murad Abuzarli & Tangui Aladjidi & Tom Bienaimé & Clara Piekarski & Wei Liu & Elisabeth Giacobino & Alberto Bramati & Quentin Glorieux, 2022. "Analogue cosmological particle creation in an ultracold quantum fluid of light," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30603-1
    DOI: 10.1038/s41467-022-30603-1
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    References listed on IDEAS

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    1. C. M. Wilson & G. Johansson & A. Pourkabirian & M. Simoen & J. R. Johansson & T. Duty & F. Nori & P. Delsing, 2011. "Observation of the dynamical Casimir effect in a superconducting circuit," Nature, Nature, vol. 479(7373), pages 376-379, November.
    2. Wayne Hu & Naoshi Sugiyama & Joseph Silk, 1997. "The physics of microwave background anisotropies," Nature, Nature, vol. 386(6620), pages 37-43, March.
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