Analog Schwarzschild black holes of Bose-Einstein condensates in a cavity: Quasinormal modes and quasibound states

• DOI: 10.1103/physrevd.107.104038
• Publication Date: 2023-05-15T15:11:10Z
• Authors: H. S. Vieira; Kyriakos Destounis; Kostas D. Kokkotas
• Keywords: Black hole (networking); Quasinormal mode; Photon sphere

Analog models of black holes have unequivocally proven to be extremely beneficial in providing critical information regarding hole spectroscopy, superradiance, quantum phenomena and most importantly Hawking radiation evaporation; topics that either recently begun bloom through gravitational wave observations or not yet been investigated astrophysical setups. Black analog experiments made astonishing steps toward the aforementioned directions are paramount understanding nature field. Recently, a tabletop Schwarzschild has proposed by placing Bose-Einstein condensates photons inside mirror's cavity, leading sink with radial vortex represents velocity singularity. Here, we provide an extensive spectral analysis both acoustic its higher-dimensional analog. We find quasinormal modes quasibound states share qualitative similarities systems show eikonal photon-sphere-like interpretation, which points existence phonon sphere hole. Our results, complemented calculated graybody factors analog, can theoretical test bed for future light cavity significant insights classical holes.