Near horizon approximation and beyond for a two-level atom falling into a Kerr-Newman black hole

Abstract

In this work we investigate the phenomena of acceleration radiation for a two-level atom falling into the event horizon of a Kerr-Newman black hole. In https://link.aps.org/doi/10.1103/PhysRevD.104.065006 (Phys. Rev. D 104 (2021) 065006), it has been shown that conformal quantum mechanics has a connection to the generated Planck-like spectrum due to acceleration radiation. In this particular aspect, the near horizon approximation played a significant role. In https://link.aps.org/doi/10.1103/PhysRevD.106.025004 (Phys. Rev. D 106 (2022) 025004), we have used the beyond near horizon approximation to show that the excitation probability attains a Planck-like spectrum irrespective of the non-existence of an underlying conformal symmetry for a general class of static spherically symmetric black holes. In our analysis we have gone beyond the near horizon approximation for the rotating and charged case and even without the consideration of the conformal symmetry we observe a similar Planck-like spectrum. However, the coefficient of the spectrum is significantly different from the near horizon case. We have then considered a different scenario where a two-level atom emits multiple photons while freely falling into the event horizon of the Kerr-Newman black hole. It is observed that the Planck factor in the excitation probability is significantly small than that of the case of single-photon emission (for large number of simultaneously emitted photons from the two-level atom). Finally, we have computed the von-Neumann entropy which is also known as the horizon brightened acceleration radiation entropy or the HBAR entropy. We have carried out our analysis for a scalar field only to see the effect of the charge and rotation of the black hole in this particular scenario.

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References in corpus (13)

• The Unruh effect and its applications
• Hawking radiation in GHS and non-extremal D1-D5 blackhole via covariant anomalies
• Near-horizon aspects of acceleration radiation by free fall of an atom into a black hole
• Acceleration radiation of an atom freely falling into a Kerr black hole and near-horizon conformal quantum mechanics
• Hawking radiation in GHS blackhole, Effective action and Covariant Boundary condition
• Hawking radiation by Kerr black holes and conformal symmetry
• Quantum optics meets black hole thermodynamics via conformal quantum mechanics: II. Thermodynamics of acceleration radiation
• Hawking radiation in Reissner-Nordström blackhole with a global monopole via Covariant anomalies and Effective action
• Equivalence principle and HBAR entropy of an atom falling into a quantum corrected black hole
• Violation of equivalence in an accelerating atom-mirror system in the generalized uncertainty principle framework
• Near horizon aspects (and beyond) of acceleration radiation of an atom falling into a large class of static spherically symmetric black hole geometries
• Virtual transitions in an atom-mirror system in the presence of two scalar photons
• Anomalies, Horizons and Hawking radiation

Cited by in corpus (7)

• Observational signature of Lorentz violation in acceleration radiation
• Atom falling into a quantum corrected charged black hole and HBAR entropy
• Inverse logarithmic correction in the HBAR entropy of an atom falling into a renormalization group improved charged black hole
• Fulling-Davies-Unruh effect for accelerated two-level single and entangled atomic systems
• HBAR entropy of Infalling Atoms into a GUP-corrected Schwarzschild Black Hole and equivalence principle
• Acceleration Radiation of Freely Falling Atoms: Nonlinear Electrodynamic Effects
• Quasinormal Mode Spectroscopy via Horizon-Brightened Quantum Optics