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Comment on "Amplified emission and lasing in photonic time crystals"

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arxiv 2211.14832 v2 pith:KU36YTDV submitted 2022-11-27 physics.optics

classification physics.optics
keywords emissionphotonicfloquetmediaratespontaneousamplifiedarticles
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Lyubarov et al. (Research Articles, 22 July 2022, p. 425) claim that the spontaneous emission rate of an atom vanishes at the momentum gap edges of photonic Floquet media. We show that their theoretical prediction is based on assumptions that result in misleading interpretations on the spontaneous emission rate in photonic Floquet media.

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