Entropy of entangled three-level atoms interacting with entangled cavity fields: entanglement swapping

摘要

The dynamics of an entangled atomic system in a partial interaction withentangled cavity fields, characterizing an entanglement swapping, have beenstudied through the use of Von Neuman entropy. We consider the interaction viatwo-photon process given by a full microscopical Hamiltonian approach. Theexplicit expression of the entropy is obtained, wherewith we estimated thelargest period. The numerical simulation of the entropy of the entangled atomicand cavity systems shows that its time evolution presents multi-periodicity.The effects of detuning parameter on the period and the amplitude of theentropy are also discussed.