Universal Quantum Error Mitigation via Random Inverse Depolarizing Approximation

TL;DR

This paper introduces RIDA, a universal error mitigation technique for quantum computing that uses random circuits to estimate and correct for depolarization noise, improving the accuracy of expectation values.

Contribution

RIDA is a novel, simple method that employs random inverse depolarizing approximations to effectively mitigate errors in near-term quantum devices.

Findings

RIDA outperforms existing benchmarks in numerical tests.

It significantly improves the accuracy of quantum expectation values.

Applicable across physics and chemistry quantum applications.

Abstract

Given the severity of noise in near-term quantum computing, error mitigation is essential to reduce error in quantum-computer-generated expectation values. We introduce RIDA (Random Inverse Depolarizing Approximation), a simple universal method that harnesses randomly generated circuits to estimate a given circuit's global depolarization probability and corresponding error-free expectation value. Numerical tests indicate RIDA outperforms key benchmarks, suggestive of significant accuracy improvements for applications of quantum computing across fields including physics and chemistry.