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Abstract: We calculate quantum fluctuations of a free scalar field in theSchwarzschild-de Sitter space-time, adopting the planar coordinates that ispertinent to the presence of a black hole in an inflationary universe. In aperturbation approach, doing expansion in powers of a small black hole eventhorizon compared to the de Sitter cosmological horizon, we obtain timeevolution of the quantum fluctuations and then derive the scalar powerspectrum.



Autor: Hing-Tong Cho, Kin-Wang Ng, I-Chin Wang

Fuente: https://arxiv.org/



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