Deterministic generation of multiparticle entanglement in a coupled cavity-fiber system

TL;DR

This paper presents a one-step, deterministic method for generating multiparticle entanglement between distant atomic clouds in coupled cavity-fiber systems, with robustness against cavity and fiber losses, advancing quantum communication.

Contribution

The authors propose a novel scheme for deterministic multiparticle entanglement in a coupled cavity-fiber system, insensitive to cavity and fiber losses, and feasible with current experimental technology.

Findings

Entanglement can be engineered deterministically with proper parameter tuning.

The scheme is robust against cavity and fiber losses.

Experimental feasibility is supported by recent advances in cavity-atom coupling.

Abstract

We develop a one-step scheme for generating multiparticle entangled states between two cold atomic clouds in distant cavities coupled by an optical fiber. We show that, through suitably choosing the intensities and detunings of the fields and precisely tuning the time evolution of the system, multiparticle entanglement between the separated atomic clouds can be engineered deterministically, in which quantum manipulations are insensitive to the states of the cavity and losses of the fiber. The experimental feasibility of this scheme is analyzed based on recent experimental advances in the realization of strong coupling between cold $^{87}$Rb clouds and fiber-based cavity. This scheme may open up promising perspectives for implementing quantum communication and networking with coupled cavities connected by optical fibers.