Bounding the Greybody Factors for Non-rotating Black Holes

Understand

Semiclassical black holes emit radiation called Hawking radiation.

• Such radiation, as seen by an asymptotic observer far outside the black hole, differs from original radiation near the horizon of the black hole by a redshift factor and the so-called "greybody factor".
• In this paper, we concentrate on the greybody factor-various bounds for the greybody factors of non-rotating black holes are obtained, concentrating on charged Reissner-Nordstrom and Reissner-Nordstrom-de Sitter black holes.
• These bounds can be derived by using a 2x2 transfer matrix formalism.