https://doi.org/10.1140/epjs/s11734-023-00987-2
Regular Article
Vacuum representations of blackbody radiation
School of Physics and Astronomy, University of Glasgow, G128QQ, Glasgow, UK
a
stephen.barnett@glasgow.ac.uk
Received:
5
April
2023
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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