Full protection of superconducting qubit systems from coupling errors

TL;DR

This paper introduces an encoding method that fully protects superconducting qubit systems from coupling errors and partially from electronic noise, enhancing scalability and coherence in quantum computing architectures.

Contribution

The authors propose a novel encoding scheme that offers complete error protection from coupling errors in superconducting qubits with XY-interaction.

Findings

Encoding achieves full protection against coupling errors.

Partial protection against electronic noise is demonstrated.

Enhances scalability of superconducting qubit systems.

Abstract

Solid state qubits realized in superconducting circuits are potentially extremely scalable. However, strong decoherence may be transferred to the qubits by various elements of the circuits that couple individual qubits, particularly when coupling is implemented over long distances. We propose here an encoding that provides full protection against errors originating from these coupling elements, for a chain of superconducting qubits with a nearest neighbor anisotropic XY-interaction. The encoding is also seen to provide partial protection against errors deriving from general electronic noise.