[SEMINARI] SEMINAR: Roberto Floreanini, Entanglement generation in a bath of weakly coupled quantum fields

[German Rodrigo Garcia]

Entanglement generation in a bath of weakly coupled quantum fields

Roberto Floreanini
INFN, Trieste (Italia)
Thursday, 5 of October of 2006     12:00 PM
Theoretical Physics Seminars room

Abstract

The time evolution of two, independent two-level atoms immersed in a bath 
of external quantum fields is described by a quantum dynamical semigroup, 
i.e. by a one-parameter family of linear transformations acting on the 
space of atom states, encoding effects of noise and dissipation. Although 
not directly coupled, the two atoms can become quantum correlated 
(entangled) through the indirect action of the bath: entanglement 
production can be controlled by varying the bath temperature and the 
spacial distance between the atoms. For infinitesimally close atoms, the 
quantum correlations can persist even for very long times.