Ginzburg effect in a dielectric medium with dispersion and dissipation
| Autor: | Lang, Sascha, Sauerbrey, Roland, Schützhold, Ralf, Unruh, William G. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | As a quantum analog of Cherenkov radiation, an inertial photon detector moving through a medium with constant refractive index $n$ may perceive the electromagnetic quantum fluctuations as real photons if its velocity $v$ exceeds the medium speed of light $c/n$. For dispersive Hopfield type media, we find this Ginzburg effect to extend to much lower $v$ because the phase velocity of light is very small near the medium resonance. In this regime, however, dissipation effects become important. Via an extended Hopfield model, we present a consistent treatment of quantum fluctuations in dispersive and dissipative media and derive the Ginzburg effect in such systems. Finally, we propose an experimental test. Comment: 11 pages, significantly extended version; with additional details on the pathway of dissipation (and comparisons to existing models) and on the scenario of fast atoms moving close to a medium |
| Databáze: | arXiv |
| Externí odkaz: |
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