Effect of phase-damped cavity on dynamics of tangles of a nondegenerate two-photon JC model

Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

“…Without decoherence, the von Neumann entropy, linear and Wehrl entropies of a bipartite-system are used to measure the entanglement between the two sub-systems 12 . Whereas, with the decoherence, the Wehrl entropy is used only to measure the phase space purity-loss of one of them 34 .…”

“…Without decoherence, the von Neumann entropy, linear and Wehrl entropies of a bipartite-system are used to measure the entanglement www.nature.com/scientificreports/ between the two sub-systems 12 . Whereas, with the decoherence, the Wehrl entropy is used only to measure the phase space purity-loss of one of them 34 . The quantum effects, quantum coherence and non-classicality, deteriorate due to the decoherence effects.…”

Enhancement of dynamical entanglement in a dispersive two-mode Jaynes–Cummings model via superposition of photon-added pair coherent state

“…This model gives a sample to solve the interaction between a single-mode field and a two-level atom in the rotating wave approximation (RWA) [5,6]. In addition, much effort has been made in studying possible extensions and generalizations of the standard JCM, for instance, a two-mode field interacting to an atom with different levels [7][8][9], as well as the interaction between an effective two-level atom with multiple modes fields [10][11][12], or multiple atoms interacting with the single-mode or two-mode fields [13][14][15]. Besides, the extensive studies of time-dependent [16,17], intensitydependent atom-field coupling [18], and deformed JCMs [19] have also enriched the physical applications of this model in many-body systems.…”

“…In the extensive JCMs, we focus on the interaction between an effective two-level atom with two-mode fields due to the efficiency of high correlation between the two modes to atomic systems [7,8,[26][27][28][29][30][31]. There have been studies on dynamics of this JCM with interesting results such as collapses and revivals of the atomic population, sub-Poissonian photon distribution and squeezing for the two-mode fields [26][27][28][29][30][31].…”

“…Besides, during the interaction of a quantum system with its environment, the phase-damped effect that occurs is one of the main obstacles to entanglement manipulations. Therefore, considering the atom-field entanglement as well as the effect of damping parameters on quantum systems are open issues of interest [7,8]. There have been various studies to investigate as well as to control the atom-field entanglement and the decoherence due to phase damping [7,8,13,31].…”