CREMASCHINI, Claudio and Massimo TESSAROTTO. Physical Properties of Schwarzschild-deSitter Event Horizon Induced by Stochastic Quantum Gravity. Entropy. 2021, vol. 23, No 5, p. "511-1"-"511-20", 20 pp. ISSN 1099-4300. Available from: https://dx.doi.org/10.3390/e23050511.
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Basic information
Original name Physical Properties of Schwarzschild-deSitter Event Horizon Induced by Stochastic Quantum Gravity
Authors CREMASCHINI, Claudio (380 Italy, belonging to the institution) and Massimo TESSAROTTO (380 Italy, belonging to the institution).
Edition Entropy, 2021, 1099-4300.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher Switzerland
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19630/21:A0000160
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.3390/e23050511
UT WoS 000653908800001
Keywords in English covariant quantum gravity;cosmological constant;Schwarzschild-deSitter space-time;event horizon;stochastic effects;tunneling phenomena
Tags 2022, FÚ, RIV22
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 15/3/2022 13:59.
Abstract
A new type of quantum correction to the structure of classical black holes is investigated. This concerns the physics of event horizons induced by the occurrence of stochastic quantum gravitational fields. The theoretical framework is provided by the theory of manifestly covariant quantum gravity and the related prediction of an exclusively quantum-produced stochastic cosmological constant. The specific example case of the Schwarzschild-deSitter geometry is looked at, analyzing the consequent stochastic modifications of the Einstein field equations. It is proved that, in such a setting, the black hole event horizon no longer identifies a classical (i.e., deterministic) two-dimensional surface. On the contrary, it acquires a quantum stochastic character, giving rise to a frame-dependent transition region of radial width delta r between internal and external subdomains. It is found that: (a) the radial size of the stochastic region depends parametrically on the central mass M of the black hole, scaling as delta r similar to M3; (b) for supermassive black holes delta r is typically orders of magnitude larger than the Planck length lP. Instead, for typical stellar-mass black holes, delta r may drop well below lP. The outcome provides new insight into the quantum properties of black holes, with implications for the physics of quantum tunneling phenomena expected to arise across stochastic event horizons.
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