Twist-and-store entanglement in bimodal and spin-1 Bose-Einstein condensates

TL;DR

This paper proposes a scheme to dynamically stabilize and enhance entanglement in bimodal and spin-1 Bose-Einstein condensates using twisting dynamics and a single rotation, with potential applications in atomic interferometry.

Contribution

It introduces a novel scheme combining twisting and a single rotation to stabilize and increase entanglement in Bose-Einstein condensates, analyzed both numerically and analytically.

Findings

Entanglement levels are maintained or increased after the rotation.

Parity measurement effectively quantifies entanglement throughout evolution.

The scheme is applicable to atomic interferometry with Bose-Einstein condensates.

Abstract

A scheme for dynamical stabilization of entanglement quantified by the quantum Fisher information is analyzed numerically and analytically for bimodal and spin-1 Bose-Einstein condensates in the context of atomic interferometry. The scheme consists of twisting dynamics followed by a single rotation of a state which limits further evolution around stable center fixed points in the mean-field phase space. The resulting level of entanglement is of the order or larger than at the moment of rotation. It is demonstrated that the readout measurement of parity quantifies the level of entanglement during entire evolution.