It is shown that the gray-body factor for a one-dimensional Bose-Einstein condensate (BEC) acoustic black hole with one horizon does not vanish in the low-frequency ($\omega\to 0$) limit. This implies that the analog Hawking radiation is dominated by the emission of an infinite number ($\frac{1}{\omega}$) of soft phonons in contrast with the case of a Schwarzschild black hole where the gray-body factor vanishes as $\omega\to 0$ and the spectrum is not dominated by low-energy particles. The infrared behaviors of certain correlation functions are also discussed
Amplifying the Hawking signal in BECs / R.Balbinot; A.Fabbri. - In: ADVANCES IN HIGH ENERGY PHYSICS (ONLINE). - ISSN 1687-7365. - STAMPA. - 2014:(2014), pp. 713574-713581. [10.1155/2014/713574]
Amplifying the Hawking signal in BECs
BALBINOT, ROBERTO;
2014
Abstract
It is shown that the gray-body factor for a one-dimensional Bose-Einstein condensate (BEC) acoustic black hole with one horizon does not vanish in the low-frequency ($\omega\to 0$) limit. This implies that the analog Hawking radiation is dominated by the emission of an infinite number ($\frac{1}{\omega}$) of soft phonons in contrast with the case of a Schwarzschild black hole where the gray-body factor vanishes as $\omega\to 0$ and the spectrum is not dominated by low-energy particles. The infrared behaviors of certain correlation functions are also discussedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
