Remote generation of entanglement for individual atoms via optical fibers

TL;DR

This paper proposes a scheme for generating entanglement between distant atoms trapped in separate cavities connected by optical fibers, which is robust against cavity leakage and atomic spontaneous emission, using synchronized laser control and quantum measurement.

Contribution

It introduces a novel entanglement generation method that works effectively in a regime insensitive to cavity leakage and unaffected by atomic spontaneous emission.

Findings

Entanglement can be generated via optical fibers with high fidelity.

The scheme is robust against cavity leakage.

Atomic spontaneous emission does not affect the fidelity.

Abstract

The generation of atomic entanglement is discussed in a system that atoms are trapped in separate cavities which are connected via optical fibers. Two distant atoms can be projected to Bell-state by synchronized turning off the local laser fields and then performing a single quantum measurement by a distant controller. The distinct advantage of this scheme is that it works in a regime that $\Delta\approx\kappa\gg g$, which makes the scheme insensitive to cavity strong leakage. Moreover, the fidelity is not affected by atomic spontaneous emission.