Effects of cavity-cavity interaction on the entanglement dynamics of a generalized double Jaynes-Cummings model
Abstract
We consider a generalized double Jaynes-Cummings model consisting of two isolated two-level 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 atom-cavity system evolves with time, is investigated for different values of the mediated cavity-cavity 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 well-known 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 two-atom 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 non-intrusive inter-cavity photon exchange that can be physically realized through cavity-QED setups in contemporary experiments. For completeness, we also compare the effects of inter-cavity interaction on entanglement with the case of direct spin-exchange interaction between the two isolated atoms.
- Publication:
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arXiv e-prints
- Pub Date:
- December 2016
- DOI:
- 10.48550/arXiv.1612.01165
- arXiv:
- arXiv:1612.01165
- Bibcode:
- 2016arXiv161201165P
- Keywords:
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- Quantum Physics;
- Physics - Atomic Physics;
- Physics - Optics
- E-Print:
- Main text (8 pages, 5 figures), Main results unchanged