منابع مشابه
End Point of Hawking Evaporation – Case of Integrable Model – ∗
Quantum back reaction due to N massless fields may be worked out to a considerable detail in a variant of integrable dilaton gravity model in two dimensions. It is shown that there exists a critical mass of collapsing object of order ¯ hN× (cosmo-logical constant) 1/2 , above which the end point of Hawking evaporation is two disconnected remnants of infinite extent, each separated by a mouth fr...
متن کاملHawking Radiation ∗
It is shown in a variant of two dimensional dilaton gravity theories that an arbitrary , localized massive source put in an initially regular spacetime gives rise to formation of the wormhole classically, without accompanying the curvature singu-larity. The semiclassical quantum correction under this wormhole spacetime yields Hawking radiation. It is expected, with the quantum back reaction add...
متن کاملHawking radiation As tunneling
We present a short and direct derivation of Hawking radiation as a tunneling process, based on particles in a dynamical geometry. The imaginary part of the action for the classically forbidden process is related to the Boltzmann factor for emission at the Hawking temperature. Because the derivation respects conservation laws, the exact spectrum is not precisely thermal. We compare and contrast ...
متن کاملUninformed Hawking radiation
We show in detail that the Parikh-Wilczek tunneling method (PWTM), which was designed for resolving the information loss problem in Hawking radiation (HR) fails whenever the radiation occurs from an isothermal process. The PWTM aims to produce a non-thermal HR which adumbrates the resolution of the problem of unitarity in quantum mechanics (QM), and consequently the entropy (or information) con...
متن کاملHawking Radiation from Decoherence
It is argued that the thermal nature of Hawking radiation arises solely due to decoherence. Thereby any information-loss paradox is avoided because for closed systems pure states remain pure. The discussion is performed for a massless scalar field in the background of a Schwarzschild black hole, but the arguments should hold in general. The result is also compared to and contrasted with the sit...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1992
ISSN: 0556-2821
DOI: 10.1103/physrevd.46.3444