Phase-controlled atom-photon entanglement in a three-level V-type atomic system via spontaneously generated coherence

TL;DR

This paper explores how phase control via spontaneous emission influences atom-photon entanglement in a three-level V-type system, revealing conditions for steady-state entanglement and disentanglement with phase-dependent dynamics.

Contribution

It introduces a detailed analysis of phase-dependent entanglement dynamics in a V-type atomic system considering spontaneous emission interference effects.

Findings

Entanglement exists at steady-state but can be controlled or eliminated.

Quantum interference makes entanglement phase-dependent.

Non-stationary entanglement dynamics are characterized.

Abstract

We investigate the dynamical behavior of the atom-photon entanglement in a V-type three-level quantum system using the atomic reduced entropy. It is shown that an atom and photons are entangled at the steady-state; however disentanglement can also be achieved in an especial condition. It is demonstrated that in the presence of quantum interference induced by spontaneous emission, the reduced entropy and the atom-photon entanglement are phase-dependent. Non-stationary solution is also obtained when the quantum interference due to the spontaneous emission is completely included.