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Hawking temperature in the tunneling picture. (English) Zbl 1248.83046
Summary: We examine Hawking radiation from a Schwarzschild black hole in several reference frames using the quasi-classical tunneling picture. It is shown that when one uses \(\Gamma\propto\exp(\mathrm{Im}[\oint p\,dr])\), rather than \(\Gamma\propto\exp(2\mathrm{Im}[\int p\,dr])\) for the tunneling probability/decay rate one obtains twice the original Hawking temperature. The former expression for \(\Gamma\) is argued to be correct since \(\oint p\,dr\) is invariant under canonical transformations, while \(\int p\,dr\) is not. Thus, either the tunneling methods of calculating Hawking radiation are suspect or the Hawking temperature is twice that originally calculated.

83C57 Black holes
83C47 Methods of quantum field theory in general relativity and gravitational theory
Full Text: DOI arXiv
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