TY  - JOUR
AU  - Carusotto, I.
AU  - Balbinot, R.
AU  - Fabbri, A.
AU  - Recati, A.
PY  - 2010
DA  - 2010//
TI  - Density correlations and analog dynamical Casimir emission of Bogoliubov phonons in modulated atomic Bose-Einstein condensates
T2  - Eur. Phys. J. D
JO  - European Physical Journal D
SP  - 391
EP  - 404
VL  - 56
IS  - 3
PB  - Springer
AB  - We present a theory of the density correlations that appear in an atomic Bose-Einstein condensate as a consequence of the emission of correlated pairs of Bogoliubov phonons by a time-dependent atom-atom scattering length. This effect can be considered as a condensed matter analog of the dynamical Casimir effect of quantum field theory. Different regimes as a function of the temporal shape of the modulation are identified and a simple physical picture of the phenomenon is discussed. Analytical expressions for the density correlation function are provided for the most significant limiting cases. This theory is able to explain some unexpected features recently observed in numerical studies of analog Hawking radiation from acoustic black holes.
SN  - 1434-6060
UR  - http://arxiv.org/abs/0907.2314
UR  - https://doi.org/10.1140/epjd/e2009-00314-3
DO  - 10.1140/epjd/e2009-00314-3
LA  - English
N1  - ISI:000274327600013
ID  - Carusotto_etal2010
ER  -