Macroscopic entanglement between localized domain walls inside a cavity

TL;DR

This paper proposes a method to generate stable, tunable entanglement between two macroscopic magnetic domain walls inside a chiral optical cavity, using optomechanical interactions to achieve robust quantum correlations.

Contribution

It introduces a novel scheme for entangling localized magnetic domain walls via cavity optomechanics, enabling control and stability at higher temperatures.

Findings

Stable entanglement persists beyond milli-Kelvin temperatures.

Entanglement can be tuned by adjusting pinning potential and optical frequency.

The scheme demonstrates potential for macroscopic quantum information processing.

Abstract

We present a scheme for generating stable and tunable entanglement between two localized Bloch domain walls in nanomagnetic strips kept inside a chiral optical cavity. The entanglement is mediated by the effective optomechanical interaction between the cavity photons and the two macroscopic, collective modes of the pinned domain walls. By controlling the pinning potential and optical driving frequency, the robust, steady-state entanglement between the two macroscopic domain walls can survive beyond the typical milli-Kelvin temperature range.