Controlling entanglement in a triple-well system of dipolar atoms

TL;DR

This paper investigates how to control and generate entanglement in a three-well system of ultracold dipolar atoms using an extended Bose-Hubbard model, proposing a protocol involving integrability breaking to produce highly entangled states.

Contribution

It introduces a novel protocol for controllably producing entanglement in a three-well dipolar atom system by combining integrability and external field tilting.

Findings

Resonant entanglement dynamics in an integrable regime.

Successful protocol for creating highly entangled and NOON-like states.

Insights into entanglement control for quantum device applications.

Abstract

We study the dynamics of entanglement and atomic populations of ultracold dipolar bosons in an aligned three-well potential described by an extended Bose-Hubbard model. We focus on a sufficiently strong interacting regime where the couplings are tuned to obtain an integrable system, in which the time evolution exhibits a resonant behavior that can be exactly predicted. Within this framework, we propose a protocol that includes an integrability breaking step by tilting the edge wells for a short time through an external field, allowing the production of quantum states with a controllable degree of entanglement. We analyze this protocol for different initial states and show the formation of highly entangled states as well as NOON-like states. These results offer valuable insights into how entanglement can be controlled in ultracold atom systems that may be useful for the proposals of new quantum devices.