Quantum vacuum excitation of a quasi-normal mode in an analog model of black hole spacetime

Abstract

Vacuum quantum fluctuations near horizons are known to yield correlated emission by the Hawking effect. We use a driven-dissipative quantum fluid of microcavity polaritons as an analog model of a quantum field theory on a black-hole spacetime and numerically calculate correlated emission. We show that, in addition to the Hawking effect at the sonic horizon, quantum fluctuations may result in a sizeable stationary excitation of a quasi-normal mode of the field theory. Observable signatures of the excitation of the quasi-normal mode are found in the spatial density fluctuations as well as in the spectrum of Hawking emission. This suggests an intrinsic fluctuation-driven mechanism leading to the quantum excitation of quasi-normal modes on black hole spacetimes.

Version accepted for publication

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• Cosmological particle production in a quantum field simulator as a quantum mechanical scattering problem
• On the origin of quasinormal modes in semi-open systems
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• Interacting Dirac fields in an expanding universe: dynamical condensates and particle production
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• Acoustic black holes in BECs with an extended sonic region
• Ergodic Hysteresis of the Kerr black hole spectrum
• Emergent quantum field theories on curved spacetimes in spinor Bose-Einstein condensates: from scalar to Proca fields