Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Near-thermal radiation in detectors, mirrors, and black holes: A stochastic approach
Author: Raval, Alpan
Hu, B. L.
Koks, Don
Citation: Physical Review D, 1997; 55(8):4795-4812
Publisher: American Physical Society
Issue Date: 1997
ISSN: 0556-2821
Statement of
Alpan Raval, B. L. Hu, Don Koks
Abstract: In analyzing the nature of thermal radiance experienced by an accelerated observer (Unruh effect), an eternal black hole (Hawking effect) and in certain types of cosmological expansion, one of us proposed a unifying viewpoint that these can be understood as arising from the vacuum fluctuations of the quantum field being subjected to an exponential scale transformation. This viewpoint, together with our recently developed stochastic theory of particle-field interaction understood as quantum open systems described by the influence functional formalism, can be used to address situations where the spacetime possesses an event horizon only asymptotically, or none at all. Examples studied here include detectors moving at uniform acceleration only asymptotically or for a finite time, a moving mirror, and a collapsing mass. We show that in such systems radiance indeed is observed, albeit not in a precise Planckian spectrum. The deviation therefrom is determined by a parameter which measures the departure from uniform acceleration or from exact exponential expansion. These results are expected to be useful for the investigation of non-equilibrium black hole thermodynamics and the linear response regime of backreaction problems in semiclassical gravity.
Rights: ©1997 The American Physical Society
DOI: 10.1103/PhysRevD.55.4795
Appears in Collections:Physics publications

Files in This Item:
File SizeFormat 
hdl_12760.pdf227.32 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.