The paper re-expresses the flat-space soft photon theorem in Schwarzschild coordinates and claims a new information pathway from scattering Hawking radiation, but the redshift premise is flawed.
Note on soft theorems and memories in even dimensions
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abstract
Recently, it has been shown that the Weinberg's formula for soft graviton production is essentially a Fourier transformation of the formula for gravitational memory which provides an effective way to understand how the classical calculation arises as a limiting case of the quantum result. In this note, we propose a general framework that connects the soft theorems to the radiation fields obtained from classical computation for different theories in even dimensions. We show that the latter is nothing but Fourier transformation of the former. The memory formulas can be derived from radiation fields explicitly.
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Scattering Hawking Radiation
The paper re-expresses the flat-space soft photon theorem in Schwarzschild coordinates and claims a new information pathway from scattering Hawking radiation, but the redshift premise is flawed.