Entanglement generation in a bath of weakly coupled quantum fields

por Roberto Floreanini (INFN, Trieste (Italia))

jueves 5 oct. 2006 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

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.