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- Title
Hawking radiation in the spacetime of white holes.
- Authors
Jusufi, Kimet
- Abstract
A white hole (WH) is a time-reversed black hole (BH) solution in general relativity with a spacetime region to which cannot be entered from the outside. Recently they have been proposed as a possible solution to the information loss problem (Haggard et al. in Phys Rev D 92:104020, <xref>2015</xref>). In particular it has been argued that the quantization of the gravitational field may prevent a BH from collapsing entirely with an exponential decay law associated to the black-hole-to-white-hole (BHWH) tunneling scenario (Barcelo et al. in Class Quantum Gravit 34:105007, <xref>2017</xref>). During this period of BHWH transition the Hawking radiation should take place. Taking this possibility into account, we utilize the Hamilton-Jacobi and Parkih-Wilczek methods to study the Hawking radiation viewed as a quantum tunneling effect to calculate the tunneling rate of vector particles tunneling inside (outside) the horizon of a WH (BH), respectively. We show that there is a Hawking radiation associated to a WH spacetime equal to the BH Hawking temperature when viewed from the outside region of the WH geometry. In the framework of Parkih-Wilczek method, surprisingly, we show that Hawking temperature is affected by the initial radial distance at which the gravitational collapse starts.
- Subjects
HAWKING radiation; SPACETIME; WHITE holes (Astronomy); BLACK holes; HAMILTON-Jacobi equations
- Publication
General Relativity & Gravitation, 2018, Vol 50, Issue 7, p1
- ISSN
0001-7701
- Publication type
Article
- DOI
10.1007/s10714-018-2406-0