Black-hole radiation in Bose-Einstein condensates
Black-hole radiation in Bose-Einstein condensates
We study the phonon fluxes emitted when the condensate velocity crosses the speed of sound, i.e., in backgrounds which are analogous to that of a black hole. We focus on elongated one-dimensional condensates and on stationary flows. Our theoretical analysis and numerical results are based on the Bogoliubov--de Gennes equation …