Atom- photon entanglement beyond the multi-photon resonance condition

TL;DR

This paper investigates atom-photon entanglement in a three-level atomic system beyond the two-photon resonance, showing how entanglement can be controlled via optical field parameters and quantum interference effects.

Contribution

It provides a numerical analysis of entanglement dynamics beyond the two-photon resonance in a three-level system, highlighting control mechanisms through field intensity, detuning, and quantum interference.

Findings

Entanglement can be controlled via optical field parameters.

Steady state entanglement is achievable beyond two-photon resonance.

Disentanglement and electromagnetically induced transparency occur under specific conditions.

Abstract

The density matrix equations of motion in near-degenerate three-level V-type closed-loop atomic system are calculated numerically in Floquet frame. The dynamical behavior of atom- photon entanglement between the dressed atom and its spontaneous emission is studied in semi classical approach beyond the two-photon resonance condition in such a system. The quantum entropy of these two subsystems is investigated by using the von Neumann entropy. It is shown that, the degree of entanglement measure (DEM) can be controlled via the intensity and the detuning of coupling optical field and quantum interference induced by spontaneous emission. Moreover in the absence of quantum interference the steady state behavior of DEM can be achieved even in beyond the two- photon resonance condition. Furthermore in the absence of quantum interference for special parameters of Rabi frequency and detuning of driving laser field disentanglement can be occurred. Also the electromagnetically induced transparency condition can be obtained when the system is disentangled.