Regular Article - Theoretical Physics
Black hole radiation with modified dispersion relation in tunneling paradigm: free-fall frame
Center for Theoretical Physics, College of Physical Science and Technology, Sichuan University, Chengdu, 610064, People’s Republic of China
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Accepted: 18 December 2015
Published online: 20 January 2016
Due to the exponential high gravitational red shift near the event horizon of a black hole, it might appear that the Hawking radiation would be highly sensitive to some unknown high energy physics. To study the effects of any unknown physics at the Planck scale on the Hawking radiation, the dispersive field theory models have been proposed, which are variations of Unruh’s sonic black hole analogy. In this paper, we use the Hamilton–Jacobi method to investigate the dispersive field theory models. The preferred frame is the free-fall frame of the black hole. The dispersion relation adopted agrees with the relativistic one at low energy but is modified near the Planck mass . The corrections to the Hawking temperature are calculated for massive and charged particles to and neutral and massless particles with to all orders. The Hawking temperature of radiation agrees with the standard one at the leading order. After the spectrum of radiation near the horizon is obtained, we use the brick wall model to compute the thermal entropy of a massless scalar field near the horizon of a 4D spherically symmetric black hole and a 2D one. Finally, the luminosity of a Schwarzschild black hole is calculated by using the geometric optics approximation.
© The Author(s), 2016