Entanglement between two spatially separated atomic modes

TL;DR

This paper demonstrates the creation of entanglement between two spatially separated ultracold atomic clouds, leveraging particle-exchange symmetry, enabling new quantum information processing possibilities with indistinguishable particles.

Contribution

It introduces a method to generate and control entanglement between separated atomic ensembles, addressing a gap in entanglement manipulation of indistinguishable particles.

Findings

Entanglement successfully generated between separated atomic clouds.

The method exploits particle-exchange symmetry in ultracold ensembles.

Potential applications in quantum information processing.

Abstract

Modern quantum technologies in the fields of quantum computing, quantum simulation and quantum metrology require the creation and control of large ensembles of entangled particles. In ultracold ensembles of neutral atoms, highly entangled states containing thousands of particles have been generated, outnumbering any other physical system by orders of magnitude. The entanglement generation relies on the fundamental particle-exchange symmetry in ensembles of identical particles, which lacks the standard notion of entanglement between clearly definable subsystems. Here we present the generation of entanglement between two spatially separated clouds by splitting an ensemble of ultracold identical particles. Since the clouds can be addressed individually, our experiments open a path to exploit the available entangled states of indistinguishable particles for quantum information applications.