Asymptotic entanglement of two atoms in squeezed light field

TL;DR

This paper investigates the long-term entanglement behavior of two atoms interacting with a squeezed light field, revealing unique asymptotic states influenced by atom separation and detuning, with potential for sustained entanglement.

Contribution

It introduces the analysis of asymptotic entanglement states in a squeezed reservoir, highlighting conditions for persistent entanglement unlike thermal reservoirs.

Findings

Existence of unique asymptotic states depending on atom separation and detuning.

Presence of a family of entangled steady states under strong correlations.

Quantification of entanglement using concurrence.

Abstract

The dynamics of entanglement between two - level atoms interacting with a common squeezed reservoir is investigated. It is shown that for spatially separated atoms there is a unique asymptotic state depending on the distance between the atoms and the atom - photons detuning. In the regime of strong correlations there is a one - parameter family of asymptotic steady - states depending on initial conditions. In contrast to the thermal reservoir both types of asymptotic states can be entangled. We calculate the amount of entanglement in the system in terms of concurrence.