Black/white hole radiation from dispersive theories

摘要: We study the fluxes emitted by black holes when using dispersive field theories. work with stationary one-dimensional backgrounds which are asymptotically flat on both sides of horizon. The asymptotic governed a 3x3 Bogoliubov transformation. corresponding white regular and inverse numerically compute spectral properties these for sub- superluminal quartic dispersion. leading deviations respect to dispersionless flux computed shown be critical frequency above there is no radiation. Unlike UV scale governing dispersion, its value critically depends background. also outside robust regime. In particular we show that low-frequency part remains almost thermal but temperature significantly differs from standard one. Applications four-dimensional Bose-Einstein condensates in preparation.