Accelerating many-body entanglement generation by dipolar interactions in the Bose-Hubbard model

TL;DR

This paper demonstrates how dipolar interactions in a two-component Bose-Hubbard model can accelerate spin squeezing, enabling Heisenberg-limited precision in quantum metrology.

Contribution

It reveals the role of dipolar interactions in activating two-axis counter-twisting dynamics for faster entanglement generation.

Findings

Dipolar interactions enhance spin squeezing speed.

The mechanism achieves Heisenberg-limited measurement accuracy.

Long-range interactions activate anisotropic twisting dynamics.

Abstract

The spin squeezing protocols allow the dynamical generation of massively correlated quantum many-body states, which can be utilized in entanglement-enhanced metrology and technologies. We study a quantum simulator generating twisting dynamics realized in a two-component Bose-Hubbard model with dipolar interactions. We show that the interplay of contact and long-range dipolar interactions between atoms in the superfluid phase activates the anisotropic two-axis counter-twisting mechanism, accelerating the spin squeezing dynamics and allowing the Heisenberg-limited accuracy in spectroscopic measurements.