Thermal radiation of various gravitational backgrounds
By Emil T.Akhmedov, V. Akhmedova, T. Pilling, Douglas Singleton. 2006
142 citations recorded by the source corpus.
We present a simple and general procedure for calculating the thermal radiation coming from any stationary metric. The physical picture is that the radiation arises as the quasiclassical tunneling of particles through a gravitational barrier. We study three cases in detail: the linear accelerating observer (Unruh radiation), the nonrotating black hole (Hawking radiation), and the rotating/orbiting observer (circular Unruh radiation). For the linear accelerating observer we obtain a thermal spectrum with the usual Unruh temperature. For the nonrotating black hole we obtain a thermal spectrum, but with a temperature twice that given by the original Hawking calculations. We discuss possible reasons for the discrepancies in temperatures as given by the two different methods. For the rotating/orbiting case the quasiclassical tunneling approach indicates that there is no thermal radiation. This result for the rotating/orbiting case has experimental implications for the experimental detection of this effect via the polarization of particles in storage rings.
Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/8b20e8e4a9315ab3479ad830539bcb358db9a0ef
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Citations in the corpus
- How often does the Unruh–DeWitt detector click? Regularization by a spatial profile (2006, background): “There is no need to specify what the trajectory will do after the moment the detector is read (cf [14]).”
- Quantum tunneling beyond semiclassical approximation (2008, background): “This ambiguity has been mentioned in more details in [15, 17 , 18, 19, 34, 35].”