Hawking radiation from acoustic black holes in relativistic heavy ion collisions

Das, Arpan; Dave, Shreyansh S.; Ganguly, Oindrila; Srivastava, Ajit M.

doi:10.1016/j.physletb.2021.136294

Cited by 4 publications

(4 citation statements)

References 37 publications

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“…We mention that for the Hawking radiation from an acoustic black hole, it is important that the fluid should have quantum nature as Hawking radiation results from the quantized modes of the relevant field. This is what is achieved in Bose-Einstein condensate (BEC) systems [7,13,14] and in the proposed quark gluon plasma (QGP) system produced in relativistic heavy-ion collisions [18]. This is also true for the present electronhydrodynamics system expected to be manifest in ultraclean systems with strong quantum correlations.…”

supporting

confidence: 52%

“…The conformal factor Ω does not affect the value of the temperature here [18]. The acoustic metric has been derived starting from fluid equations that allow the freedom to multiply the metric by an overall constant.…”

Section: Hydrodynamics Of Electrons and Acoustic Black Hole Metric -mentioning

confidence: 99%

“…Since we are considering a steady state flow where Ω = ρ(z)/c s is a function of z only, the new normalised conformal factor remains unity at z = z 0 at all times. A conformal factor with this asymptotic behavior does not affect the asymptotic Hawking temperature [18]. In the above discussion, the starting point has been non-relativistic fluid equations.…”

mentioning

confidence: 96%

“…There have been some investigations in this direction [5]. It has also been proposed by some of us that an acoustic black hole metric may be constructed in the flow of quark-gluon plasma (QGP) in relativistic heavy-ion collisions [18]. In that case, the resulting thermal radiation of acoustic phonons may be observable in terms of modification of the rapidity dependence of the transverse momentum distribution of various particles.…”

mentioning

confidence: 99%

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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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supporting

confidence: 52%

Section: Hydrodynamics Of Electrons and Acoustic Black Hole Metric -mentioning

confidence: 99%

mentioning

confidence: 96%

mentioning

confidence: 99%

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