Geodesic
Tunneling/WKB and anomaly methods for Rindler and de Sitter space–times
Teoretičeskaâ i matematičeskaâ fizika, Tome 163 (2010) no. 3, pp. 456-466 Cet article a éte moissonné depuis la source Math-Net.Ru

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We consider the WKB/tunneling method explicitly in the context of its application to the Rindler and de Sitter space–times. We also present two gravitational anomaly methods (consistent and covariant). The anomaly methods applied to the Rindler space–time do not reproduce the expected Unruh radiation, because the Rindler space–time does not have an anomaly. The consistent and the covariant anomaly methods give different results for the de Sitter space–time. In contrast to them, the WKB/tunneling method is a semiclassical calculation in which the radiation is regarded as a tunneling of quantum fields across the horizon. The tunneling method is applicable in all the indicated cases. But to recover the correct Gibbons–Hawking temperature, a previously overlooked temporal piece that contributes to the total action must be taken into account.
Keywords: Hawking radiation, Unruh effect, semiclassical tunneling. 
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V. E. Akhmedova; T. Pilling; A. de Gill; D. Singleton. Tunneling/WKB and anomaly methods for Rindler and de Sitter space–times. Teoretičeskaâ i matematičeskaâ fizika, Tome 163 (2010) no. 3, pp. 456-466. http://geodesic.mathdoc.fr/item/TMF_2010_163_3_a9/

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