Nonclassical effects in a nonlinear two trapped-particles system under intrinsic decoherence

In this paper, we analytically explore the dynamics of a nonlinear two-qubit system derived from a physical model that describes laser-irradiated two trapped particles in the Lamb-Dicke regime under appropriate resonance conditions and the intrinsic decoherence. The dynamics of the particle population inversion, the entanglement between the two trapped-particles and their center-of-mass modes, and the entanglement between the two trapped-particles are investigated under the Lamb-Dicke parameter and the intrinsic decoherence. In is found that, in the absence of decoherence, the generated particle-field and two trapped-particles entanglement can be enhanced by increasing the Lamb-Dicke parameter. The Lamb-Dicke nonlinearity effect on the generated stationary entanglement, the sudden death and sudden birth of the entanglement, and the intrinsic decoherence effect become more pronounced with its large values. For the high Lamb-Dicke non-linearity, the decoherence effect on the generated nonclassical effects can be weakened. (c) 2021 Elsevier Ltd. All rights reserved.

Automated summary

This paper analytically explores the dynamics of a nonlinear two-qubit system derived from a physical model that describes laser-irradiated two trapped particles in the Lamb-Dicke regime. It investigates the effect of Lamb-Dicke parameter and intrinsic decoherence on particle population inversion, entanglement between trapped particles and their center-of-mass modes, as well as entanglement between trapped particles. The study shows that increasing the Lamb-Dicke parameter can enhance the generated entanglement, but the effects of Lamb-Dicke nonlinearity and intrinsic decoherence become more pronounced with larger values.