Vacuum representations of blackbody radiation
School of Physics and Astronomy, University of Glasgow, G128QQ, Glasgow, UK
Accepted: 22 August 2023
Published online: 14 September 2023
We present and discuss two exact, but perhaps unfamiliar, representations of thermal radiation. The first has the form of a superposition of the quantum vacuum and a stochastic classical field and the second is the pure-state thermofield representation introduced by Takahashi and Umezawa. It is interesting that the former is, essentially, the opposite of Planck’s original conception of blackbody radiation.
© The Author(s) 2023
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