Effects of cavity–cavity interaction on the entanglement dynamics of a generalized double Jaynes–Cummings model. (19th January 2018)

• Record Type: Journal Article
• Authors: Pandit, Mahasweta; Das, Sreetama; Roy, Sudipto Singha; Dhar, Himadri Shekhar; Sen, Ujjwal
• Is Part Of: Journal of physics. Volume 51:Number 4(2018:Feb. 15)
• Publication Date: 2018-01-19
• Subjects: quantum entanglement -- entanglement sudden death -- generalized double Jaynes–Cummings model -- quantum information processing -- cavity–cavity interaction -- spin-exchange interaction -- atom–photon interaction; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aaa2cf
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We consider a generalized double Jaynes–Cummings model consisting of two isolated two-level atoms, each contained in a lossless cavity that interact with each other through a controlled photon-hopping mechanism. We analytically show that at low values of such a mediated cavity–cavity interaction, the temporal evolution of entanglement between the atoms, under the effects of cavity perturbation, exhibits the well-known phenomenon of entanglement sudden death (ESD). Interestingly, for moderately large interaction values, a complete preclusion of ESD is achieved, irrespective of its value in the initial atomic state. Our results provide a model to sustain entanglement between two atomic qubits, under the adverse effect of cavity induced perturbation, by introducing a non-intrusive inter-cavity photon exchange that can be physically realized through cavity-QED setups in contemporary experiments.