Effects of cavitycavity interaction on the entanglement dynamics of a generalized double JaynesCummings model
Abstract
We consider a generalized double JaynesCummings model consisting of two isolated twolevel atoms, each contained in a lossless cavity, with the cavities interacting with each other through a controlled photon hopping mechanism. The temporal dynamics of entanglement between the two atoms, as the atomcavity system evolves with time, is investigated for different values of the mediated cavitycavity interaction. We analytically show that at low values of such an interaction, entanglement between the atoms evolves under the effects of cavity perturbation and exhibits the wellknown phenomenon of entanglement sudden death. Interestingly, using moderately large values of the interaction, a complete preclusion of sudden death of entanglement can be achieved, irrespective of its value in the initial twoatom state. Our results, thus allow us to design a model to sustain bipartite entanglement between two atomic qubits under the adverse effect of cavity induced environmental perturbation, by introducing a nonintrusive intercavity photon exchange that can be physically realized through cavityQED setups in contemporary experiments. For completeness, we also compare the effects of intercavity interaction on entanglement with the case of direct spinexchange interaction between the two isolated atoms.
 Publication:

arXiv eprints
 Pub Date:
 December 2016
 arXiv:
 arXiv:1612.01165
 Bibcode:
 2016arXiv161201165P
 Keywords:

 Quantum Physics;
 Physics  Atomic Physics;
 Physics  Optics
 EPrint:
 Main text (8 pages, 5 figures), Main results unchanged