An investigation of a nonlocal entanglement of two uncoupled atoms embedded in a coherent cavity field and the associated phase space distribution: one quantum non-linear process

Details An investigation of a nonlocal entanglement of two uncoupled atoms embedded in a coherent cavity field and the associated phase space distribution: one quantum non-linear process An investigation of a nonlocal entanglement of two uncoupled atoms embedded in a coherent cavity field and the associated phase space distribution: one quantum non-linear process

2010-03-13

arxiv.org/abs/1003.2683v1

Physics

Quantum Physics

21 pages, 12 figures

Scientific paper

Entanglement properties of two uncoupled atoms embedded in a coherent field distribution through one quantum transition process is studied. A case of non-linear Hamiltonian of the problem is considered through which the effect of a non-linear media is illustrated. Moreover, the effect of the frequency difference between the interatomic transition and the electromagnetic field is also analyzed. We show that, adjusting the considered parametres of the non-linear media and frequency difference leads to a strong control of the degree of entanglement where excellent periodicity of entanglement evolution can be obtained which is very important in predicting the behavior of transmitted information through the application of various information processing schemes. We present a detailed and comparative study of atom-atom entanglement for two cases corresponding to different injections of the two atoms into the cavity field. Moreover, we present an answer to the question: How does the quantum phase space structure for a composite system relate to the entanglement characteristics of the corresponding quantum system? We demonstrate how the entanglement in nonlinear tripartite systems can be associated with a delocalization in the phase space distribution.

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