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

Park, Jagang; Park, Hee Chul; Lee, Kyungmin; Shin, Jonghwa; Ryu, Jung-Wan; Jeon, Wonju; Park, Namkyoo; Min, Bumki

doi:10.48550/arXiv.2211.14832

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

preprint

posted on 2023-01-10, 03:23 authored by Jagang Park, Hee Chul Park, Kyungmin Lee, Jonghwa Shin, Jung-Wan Ryu, Wonju Jeon, Namkyoo Park, Bumki Min

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.