Creating and observing N-partite entanglement with atoms

TL;DR

This paper proposes two experimental schemes using atoms—Bose-Einstein condensates and Rydberg atoms—to demonstrate N-partite entanglement, advancing methods for verifying complex quantum entanglement.

Contribution

It introduces two novel experimental approaches for demonstrating N-partite entanglement with atoms, based on stricter bounds related to the Mermin inequality.

Findings

Proposed scheme with Bose-Einstein condensates in optical lattices.

Proposed scheme with Rydberg atoms in microwave cavities.

Provides criteria for confirming N-partite entanglement.

Abstract

The Mermin inequality provides a criterion for experimentally ruling out local-realistic descriptions of multiparticle systems. A violation of this inequality means that the particles must be entangled, but does not, in general, indicate whether N-partite entanglement is present. For this, a stricter bound is required. Here we discuss this bound and use it to propose two different schemes for demonstrating N-partite entanglement with atoms. The first scheme involves Bose-Einstein condensates trapped in an optical lattice and the second uses Rydberg atoms in microwave cavities.