Nonlocality with ultracold atoms in a lattice

TL;DR

This paper proposes a feasible method to generate and detect nonlocal states with ultracold atoms in optical lattices, demonstrating Bell inequality violations using accessible experimental techniques.

Contribution

It introduces a practical scheme for creating nonlocal states in ultracold atoms that can be implemented with existing technology, enabling studies of multipartite entanglement.

Findings

Bell inequality violation demonstrated with ultracold atoms

Scheme uses only beam splitting and phase shifts

Compatible with current single-site addressing technology

Abstract

We sudy the creation of nonlocal states with ultracold atoms trapped in an optical lattice. We show that these states violate Bell inequality by measuring one- and two-body correlations. Our scheme only requires beam splitting operations and global phase shifts, and can be realized within the current technology, employing single-site addressing. This proposal paves the way to study multipartite nonlocality and entanglement in ultracold atomic systems.