General error mitigation for quantum circuits

TL;DR

This paper presents a comprehensive error mitigation method for quantum circuits that improves upon existing techniques, tested on IBM Q devices with promising results in reducing errors.

Contribution

It introduces a general error mitigation approach that addresses more error sources than previous methods and demonstrates its effectiveness on real quantum hardware.

Findings

Significant error reduction observed on IBM Q devices

Method outperforms existing error mitigation techniques

Applicable to circuits with up to four qubits

Abstract

A general method to mitigate the effect of errors in quantum circuits is outlined. The method is developed in sight of characteristics that an ideal method should possess and to ameliorate an existing method which only mitigates state preparation and measurement errors. The method is tested on different IBM Q quantum devices, using randomly generated circuits with up to four qubits. A large majority of results show significant error mitigation.