Gravitational anomaly and Hawking radiation of apparent horizon in FRW universe |
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Authors: | Ran Li Ji-Rong Ren and Shao-Wen Wei |
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Institution: | (1) Institute of Theoretical Physics, Lanzhou University, Lanzhou, 730000, Gansu, China |
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Abstract: | Motivated by the successful applications of the anomaly cancellation method to derive Hawking radiation from various types
of black hole spacetimes, we further extend the gravitational anomaly method to investigate the Hawking radiation from the
apparent horizon of a FRW universe by assuming that the gravitational anomaly also exists near the apparent horizon of the
FRW universe. The result shows that the radiation flux from the apparent horizon of the FRW universe measured by a Kodama
observer is just the pure thermal flux. The result presented here will further confirm the thermal properties of the apparent
horizon in a FRW universe. |
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Keywords: | PACS" target="_blank">PACS 04 62 +v 04 70 Dy 11 30-j |
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