Topological Entanglement Stabilization in Superconducting Quantum Circuits

TL;DR

This paper proposes a method to use topological modes in superconducting circuits to stabilize entangled quantum states, demonstrating robustness against parameter fluctuations and disorder, advancing quantum information stability.

Contribution

It introduces a novel scheme leveraging topological modes in superconducting circuits to stabilize entanglement, with a detailed experimental proposal.

Findings

Entanglement remains stable in the topologically non-trivial regime.

Entanglement is highly susceptible in the trivial regime.

The scheme offers robustness against circuit parameter disorder.

Abstract

Topological properties of quantum systems are one of the most intriguing emerging phenomena in condensed matter physics. A crucial property of topological systems is the symmetry-protected robustness towards local noise. Experiments have demonstrated topological phases of matter in various quantum systems. However, using the robustness of such modes to stabilize quantum correlations is still a highly sought-after milestone. In this work, we put forward a concept of using topological modes to stabilize fully entangled quantum states, and we demonstrate the stability of the entanglement with respect to parameter fluctuations. Specifically, we see that entanglement remains stable against parameter fluctuations in the topologically non-trivial regime, while entanglement in the trivial regime is highly susceptible. We supplement our scheme with an experimentally realistic and detailed proposal based on coupled superconducting resonators and qubits. Our proposal sets a novel approach for generating long-lived quantum modes with robustness towards disorder in the circuit parameters via a bottom-up experimental approach relying on easy-to-engineer building blocks.