2024-03-29T12:28:37Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/232092016-02-16T06:46:49Zcom_10261_61com_10261_4col_10261_314
2010-04-16T11:40:42Z
urn:hdl:10261/23209
Density correlations and analog dynamical Casimir emission of Bogoliubov phonons in modulated atomic Bose-Einstein condensates
Fabbri, Alessandro
Carusotto, Iacopo
Balbinot, Roberto
Recati, Alessio
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.
2010-04-16T11:40:42Z
2010-04-16T11:40:42Z
2010-02
artÃculo
European Physical Journal D - Atomic Molecular Optical and Plasma Physics 56 (3): 391-404 (2010)
1434-6060
http://hdl.handle.net/10261/23209
10.1140/epjd/e2009-00314-3
eng
http://dx.doi.org/ 10.1140/epjd/e2009-00314-3
openAccess
Springer