Can thermal emission from time-varying media be described
semiclassically?
- URL: http://arxiv.org/abs/2401.09897v1
- Date: Thu, 18 Jan 2024 11:22:22 GMT
- Title: Can thermal emission from time-varying media be described
semiclassically?
- Authors: I\~nigo Liberal, J. Enrique V\'azquez-Lozano, Antonio
Ganfornina-Andrades
- Abstract summary: We derive a semiclassical theory to thermal emission from time-varying media based on fluctuational electrodynamics.
Our results show that a quantum theory is needed to correctly capture the contribution from quantum vacuum amplifications effects.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Time-varying media, i.e., materials whose properties dynamically change in
time, have opened new possibilities for thermal emission engineering by lifting
the limitations imposed by energy conservation and reciprocity, and providing
access to nonequilibrium dynamics. In addition, quantum effects, such as vacuum
amplification and emission at zero temperature, have been predicted for
time-varying media, reopening the debate on the quantum nature of thermal
emission. Here, we derive a semiclassical theory to thermal emission from
time-varying media based on fluctuational electrodynamics, and compare it to
the quantum theory. Our results show that a quantum theory is needed to
correctly capture the contribution from quantum vacuum amplifications effects,
which can be relevant even at room temperature and mid-infrared frequencies.
Finally, we propose corrections to the standard semiclassical theory that
enable the prediction of thermal emission from time-varying media with
classical tools.
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