9 research outputs found
Alternative scheme to generate a supersinglet state of three-level atoms
In this paper we propose an alternative scheme to generate a supersinglet
state of three three-level atoms via a single-mode of a cavity QED based on the
two-photon transitions described by the 'full microscopical Hamiltonian
approach'. In it, three three-level atoms prepared in suitable initial states
are sequentially sent through the cavity originally prepared in its vacuum
state. After an appropriate choice of the atom-cavity interaction times plus a
field detection the state that describes the whole atom-field system is
projected in the desired supersinglet state. The fidelity and success
probability of the state as well as the practical feasibility of the scheme are
discussed.Comment: 10 pages, 3 figures, 4 table
Entropy of entangled three-level atoms interacting with entangled cavity fields: entanglement swapping
The dynamics of an entangled atomic system in a partial interaction with
entangled cavity fields, characterizing an entanglement swapping, have been
studied through the use of Von Neuman entropy. We consider the interaction via
two-photon process given by a full microscopical Hamiltonian approach. The
explicit expression of the entropy is obtained, wherewith we estimated the
largest period. The numerical simulation of the entropy of the entangled atomic
and cavity systems shows that its time evolution presents multi-periodicity.
The effects of detuning parameter on the period and the amplitude of the
entropy are also discussed.Comment: 5 pages, 8 figure