Stimulated Hawking emission from electromagnetic analogue black hole: Theory and observation

Bera, Avijit; Ghosh, Subir

doi:10.1103/physrevd.101.105012

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…On the experimental side, Hawking radiation has been successfully measured in the works reported in Muñoz and Isoard M [9,10]. And also carried out in other branches of physics [11][12][13][14][15][16]. However, in the physics of acoustic black holes, the first experimental measurement of Hawking radiation was devised in the Bose-Einstein condensate [17].…”

Section: Introductionmentioning

confidence: 99%

Modified Metrics of Acoustic Black Holes: A Review

Anacleto¹,

Brito²,

Passos³

2023

PSBJ

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In this brief review, we will address acoustic black holes arising from quantum field theory in the Lorentz-violating and non-commutative background. Thus, we consider canonical acoustic black holes with effective metrics for the purpose of investigating Hawking radiation and entropy. We show that due to the generalized uncertainty principle and the modified dispersion relation, the Hawking temperature is regularized, that is, free from the singularity when the horizon radius goes to zero. In addition, we also find logarithmic corrections in the leading order for entropy.

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Section: Introductionmentioning

confidence: 99%

Modified Metrics of Acoustic Black Holes: A Review

Anacleto¹,

Brito²,

Passos³

2023

PSBJ

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“…One may consider echoes as stimulated emission of Hawking radiation, caused by the GWs that excite the quantum BH microstructure [7,8]. While stimulated Hawking radiation has been seen in analogue BH/white hole systems, based on water waves, nonlinear optics, or Bose-Einstein condensates, for nearly a decade [9][10][11][12][13][14], they have remained elusive in real gravitational BHs.…”

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confidence: 99%

GW190521: First Measurement of Stimulated Hawking Radiation from Black Holes

Abedi¹,

Micchi²,

Afshordi³

2022

Preprint

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Being the most massive binary black hole black hole merger event observed to date, GW190521 is in a class of its own. The exceptionally loud ringdown of this merger makes it an ideal candidate to search for gravitational wave echoes, a proposed smoking gun for the quantum structure of black hole horizons. We perform an unprecedented multi-pronged search for echoes via two well-established and independent pipelines: a template-based search for stimulated emission of Hawking radiation, or Boltzmann echoes, and the model-agnostic coherent WaveBurst (cWB) search. Stimulated Hawking radiation from the merger is expected to lead to post-merger echoes at horizon mode frequency of ∼ 50 Hz (for quadrupolar gravitational radiation), repeating at intervals of ∼ 1 second, due to partial reflection off Planckian quantum structure of the horizon. A careful analysis using dynamic nested sampling yields a Bayesian evidence of 7 ± 2 (90% confidence level) for this signal following GW190521, carrying an excess of 10 +9 −7 % in gravitational wave energy, relative to the main event. Similarly, the reconstructed waveform of the first echo in cWB carries an energy excess of 13 +16 −7 %. Accounting for the "look-elsewhere" effects, we estimate a p-value for false detection probability of 5.1 × 10 −3 (or 2.6σ) using cWB pipeline, although the verdict on the co-localization of the post-merger echo and the main event in the sky is inconclusive. While the current evidence for stimulated Hawking radiation does not reach the gold standard of 5σ, our findings are in line with expectations for stimulated Hawking radiation at current detector sensitivities. The next generation of gravitational wave observatories can thus draw a definitive conclusion on the quantum nature of black hole horizons.

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“…Numerous studies have been carried out to probe this possibility ( [5][6][7][8][9][10][11][12] and references therein). Many investigations with cold atom systems have focused on the signature of Hawking radiation in terms of correlated pairs of Hawking particles emitted from the sonic horizon, with the two partners of the pair propagating on the two sides of the sonic horizon [13][14][15][16][17].…”

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confidence: 99%

Hawking radiation from acoustic black holes in hydrodynamic flow of electrons

Dave¹,

Ganguly²,

Saumia³

et al. 2022

EPL

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Acoustic black holes are formed when a ﬂuid ﬂowing with subsonic velocities, accelerates and becomes supersonic. When the ﬂow is directed from the subsonic to supersonic region, the surface on which the normal component of ﬂuid velocity equals the local speed of sound acts as an acoustic horizon. This is because no acoustic perturbation from the supersonic region can cross it to reach the subsonic part of the ﬂuid. One can show that if the ﬂuid velocity is locally irrotational, the ﬁeld equations for acoustic perturbations of the velocity potential are identical to that of a massless scalar ﬁeld propagating in a black hole background. One, therefore, expects Hawking radiation in the form of a thermal spectrum of phonons. There have been numerous investigations of this possibility, theoretically, as well as experimentally, in systems ranging from cold atom systems to quark-gluon plasma formed in relativistic heavy-ion collisions. Here we investigate this possibility in the hydrodynamic ﬂow of electrons. Resulting Hawking radiation in this case should be observable in terms of current ﬂuctuations. Further, current ﬂuctuations on both sides of the acoustic horizon should show correlations expected for pairs of Hawking particle.

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Stimulated Hawking emission from electromagnetic analogue black hole: Theory and observation

Cited by 11 publications

References 30 publications

Modified Metrics of Acoustic Black Holes: A Review

Modified Metrics of Acoustic Black Holes: A Review

GW190521: First Measurement of Stimulated Hawking Radiation from Black Holes

Hawking radiation from acoustic black holes in hydrodynamic flow of electrons

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