Entanglement and spin squeezing of Bose condensed atoms

TL;DR

This paper introduces a scheme for creating highly entangled states in Bose-Einstein condensates using coherent Raman processes, enabling detection without single-atom resolution.

Contribution

It presents a novel coherent coupling method for generating massive entanglement in Bose-Einstein condensates via molecular intermediate states.

Findings

Scheme can produce maximally entangled states

Supports detection without single-atom resolution

Compared favorably with other entanglement methods

Abstract

We propose a direct, coherent coupling scheme that can create massively entangled states of Bose-Einstein condensed atoms. Our idea is based on an effective interaction between two atoms from coherent Raman processes through a (two atom) molecular intermediate state. We compare our scheme with other recent proposals for generation of massive entanglement of Bose condensed atoms. We also present explicit calculations that support detecting maximally entangled states without requiring single atom resolved measurements.