Accreditation Against Limited Adversarial Noise

TL;DR

This paper introduces an improved quantum accreditation protocol that effectively verifies quantum states even under adversarial error conditions, maintaining efficiency and practicality for near-term quantum applications.

Contribution

It upgrades a previous accreditation protocol to handle adversarial errors without losing efficiency or applicability for near-term quantum devices.

Findings

Protocol successfully detects adversarial errors

Maintains efficiency comparable to non-adversarial protocols

Applicable to practical near-term quantum systems

Abstract

I present an accreditation protocol (a variety of quantum verification) where error is assumed to be adversarial (in contrast to the assumption error is implemented by identical CPTP maps used in previous accreditation protocols) - albeit slightly modified to reflect physically motivated error assumptions. This is achieved by upgrading a pre-existing accreditation protocol (from [S. Ferracin et al. Phys. Rev. A 104, 042603 (2021)]) to function correctly in the face of adversarial error, with no diminution in efficiency or suitability for near-term usage.