Topological rejection of noise by quantum skyrmions

TL;DR

This paper demonstrates that quantum skyrmions possess topological properties that make quantum information encoded in them inherently resistant to environmental noise, offering a new pathway for robust quantum communication.

Contribution

It introduces the concept of topological quantum observables based on quantum skyrmions, enabling noise resilience without relying on entanglement robustness.

Findings

Quantum skyrmions exhibit resilience to noise in quantum information processing.

Topological observables remain stable even as entanglement measures decay.

Theoretical analysis explains the topological mechanisms behind this robustness.

Abstract

An open challenge in the context of quantum information processing and communication is improving the robustness of quantum information to environmental contributions of noise, a severe hindrance in real-world scenarios. Here, we show that quantum skyrmions and their nonlocal topological observables remain resilient to noise even as typical entanglement witnesses and measures of the state decay. This allows us to introduce the notion of digitization of quantum information based on our new discrete topological quantum observables, foregoing the need for robustness of entanglement. We compliment our experiments with a full theoretical treatment that unlocks the quantum mechanisms behind the topological behaviour, explaining why the topology leads to robustness. Our approach holds exciting promise for intrinsic quantum information resilience through topology, highly applicable to real-world systems such as global quantum networks and noisy quantum computers.