# Quantum computation with universal error mitigation on superconducting quantum processor

## TL;DR

This paper demonstrates a universal quantum error mitigation protocol using gate set tomography and quasiprobability decomposition on superconducting quantum processors, effectively suppressing errors without fault tolerance.

## Contribution

It introduces a novel, universal error mitigation method applicable to digital quantum computers, enhancing computation accuracy on near-term devices.

## Key findings

- Successful error suppression in one- and two-qubit circuits
- Protocol is universal for various quantum algorithms
- Potential to enable more reliable near-term quantum computing

## Abstract

Medium-scale quantum devices that integrate about hundreds of physical qubits are likely to be developed in the near future. However, such devices will lack the resources for realizing quantum fault tolerance. Therefore, the main challenge of exploring the advantage of quantum computation is to minimize the impact of device and control imperfections without encoding. Quantum error mitigation is a solution satisfying the requirement. Here, we demonstrate an error mitigation protocol based on gate set tomography and quasiprobability decomposition. One- and two-qubit circuits are tested on a superconducting device, and computation errors are successfully suppressed. Because this protocol is universal for digital quantum computers and algorithms computing expected values, our results suggest that error mitigation can be an essential component of near-future quantum computation.