One-axis twisting as a method of generating many-body Bell correlations

TL;DR

This paper shows that one-axis twisting (OAT) can generate many-body Bell correlations in bosonic qubits, providing an analytical framework to predict when and how these quantum correlations emerge, with applications demonstrated via the Bose-Hubbard model.

Contribution

It offers a fully analytical and universal treatment of OAT for creating many-body Bell correlations, identifying critical times and correlation depths.

Findings

Bell correlations emerge at a specific critical time

Analytical predictions match dynamics in the Bose-Hubbard model

OAT is a versatile method for non-classical state generation

Abstract

We demonstrate that the one-axis twisting (OAT), a versatile method of creating non-classical states of bosonic qubits, is a powerful source of many-body Bell correlations. We develop a fully analytical and universal treatment of the process, which allows us to identify the critical time at which the Bell correlations emerge, and predict the depth of Bell correlations at all subsequent times. Our findings are illustrated with a highly non-trivial example of the OAT dynamics generated using the Bose-Hubbard model.