Non-hermitian topology and entanglement in an optomechanical superlattice

TL;DR

This paper proposes an optomechanical superlattice system where topologically protected states exhibit entanglement between mechanical and optical modes, robust against thermal effects, with a suggested experimental observation protocol.

Contribution

It introduces a novel optomechanical setup demonstrating topological states with entangled modes and robustness against temperature, advancing quantum device design.

Findings

Topologically protected end states with entanglement.

Entanglement robustness against nonzero-temperature baths.

Proposed experimental protocol for observing entanglement.

Abstract

The interplay between topology, dissipation and nonlinearities can give rise to a wealth of new phenomena and pave the way for novel topological lasers, sensors and other quantum devices. Along these lines, we propose here an optomechanical setup in which the concomitant presence of a spatially modulated external drive and dissipation gives rise to a topologically nontrivial state for mechanical and optical excitations. We are able to show that the one-dimensional system considered here exhibits topologically protected end states for which mechanical and optical degrees of freedom are entangled. We show such entanglement to be robust with respect to the presence of nonzero-temperature baths and we propose a protocol for experimental observation of the entanglement.