Robust Preparation of GHZ and W States of Three Distant Atoms

TL;DR

This paper proposes robust schemes for generating GHZ and W entangled states of three distant atoms using indistinguishable photons, which are resilient to detection inefficiencies and asynchronous emissions, enhancing experimental feasibility.

Contribution

The paper introduces novel, robust methods for creating GHZ and W states of distant atoms that do not require simultaneous detection, improving practical implementation.

Findings

Schemes are robust against detection inefficiency.

No need for simultaneous photon detection in Lamb-Dicke limit.

Applicable to realistic experimental conditions.

Abstract

Schemes to generate Greenberger-Horne-Zeilinger(GHZ) and W states of three distant atoms are proposed in this paper. The schemes use the effects of quantum statistics of indistinguishable photons emitted by the atoms inside optical cavities. The advantages of the schemes are their robustness against detection inefficiency and asynchronous emission of the photons. Moreover, in Lamb-Dicke limit, the schemes do not require simultaneous click of the detectors, this makes the schemes more realizable in experiments.