Massless vs. Massive Hawking Radiation in AdS$_2$ Spacetime
Sung-Won Kim, Won Tae Kim, John J. Oh
TL;DR
This paper compares massless and massive Hawking radiation in two-dimensional AdS spacetime, calculating quantum stress-energy tensors and scattering coefficients, revealing that massive radiation persists unlike the massless case.
Contribution
It provides a detailed analysis of both massless and massive Hawking radiation in AdS$_2$, highlighting the presence of massive radiation through scattering analysis.
Findings
Massless radiation yields null quantum stress-energy tensor.
Massive radiation shows nonzero emission due to scattering effects.
Scattering analysis relates absorption and reflection coefficients to Hawking temperature.
Abstract
We study massless and massive Hawking radiations on a two-dimensional AdS spacetime. For the massless case, the quantum stress-energy tensor of a massless scalar field on the AdS background is calculated, and the expected null radiation is obtained. However, for the massive case, the scattering analysis is performed in order to calculate the absorption and reflection coefficients which are related to statistical Hawking temperature. On the contrary to the massless case, we obtain a nonvanishing massive radiation.
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