PT Journal
AU Anderson, PR
   Balbinot, R
   Fabbri, A
   Parentani, R
TI Gray-body factor and infrared divergences in 1D BEC acoustic black holes
SO Physical Review D
JI Phys. Rev. D
PY 2014
BP 104044
EP 6pp
VL 90
IS 10
DI 10.1103/PhysRevD.90.104044
LA English
AB It is shown that the gray-body factor for a one-dimensional elongated Bose-Einstein condensate (BEC) acoustic black hole with one horizon does not vanish in the low-frequency (omega -> 0) limit. This implies that the analog Hawking radiation is dominated by the emission of an infinite number (1/omega) of soft phonons in contrast with the case of a Schwarzschild black hole where the gray-body factor vanishes as omega -> 0 and the spectrum is not dominated by low-energy particles. The infrared behaviors of certain correlation functions are also discussed.
ER