Generating quantum discord between two distant Bose-Einstein condensates with Bell-like detection

TL;DR

This paper introduces a method to generate and manipulate quantum discord and entanglement between two distant Bose-Einstein condensates using non-ideal Bell-like detection on optical cavity outputs.

Contribution

It presents a novel technique for creating and controlling quantum correlations between remote BECs via non-ideal Bell-like detection, including explicit covariance matrix analysis.

Findings

Quantum discord can be generated between distant BECs.

Non-ideal Bell-like detection can create entanglement at remote sites.

The covariance matrix explicitly shows manipulation of quantum correlations.

Abstract

We propose a technique that enables the creation of quantum discord between two distant nodes, each containing a cavity consist of the Bose-Einstein condensate, by applying a non-ideal Bell-like detection on the output modes of optical cavities. We find the covariance matrix of the system after the non-ideal Bell-like detection, showing explicitly that one enables manipulation of the quantum correlations, and particularly quantum discord, between remote Bose-Einstein condensates. We also find that the non-ideal Bell-like detection can create entanglement between distant Bose-Einstein condensates at the two remote sites