---
title: Qiskit Mitigation
description: Documentation for the latest version of Qiskit mitigation
source: https://quantum.cloud.ibm.com/docs/en/addons/qiskit-mitigation
---

# Qiskit Mitigation

Qiskit Mitigation is a package for handling noise in quantum computations. It contains a set of techniques that can be used to build advanced or customized error mitigation pipelines directly with [Samplomatic](https://github.com/Qiskit/samplomatic). Specifically, it contains:

1. Implementations of Probabilistic Error Cancellation (PEC), Twirled Readout Error eXtinction (TREX), and Zero-Noise Extrapolation (ZNE) with Probabilistic Error Amplification (PEA) and gate-folding amplification methods.
2. Functionality for computing a postselected noise channel, from circuit symmetries or spacetime checks, to be used with PEC to reduce sampling overhead [\[1\]](#references).
3. Postselection using non-Markovian error checks to filter corrupted samples out of measured data.
4. Support for expectation value calculation with advanced error mitigation.

## Contributing

The source code is available [on GitHub](https://github.com/Qiskit/qiskit-mitigation).

The developer guide is located at [CONTRIBUTING.md](https://github.com/Qiskit/qiskit-mitigation/blob/main/CONTRIBUTING.md) in the root of this project’s repository. By participating, you are expected to uphold Qiskit’s [code of conduct](https://github.com/Qiskit/qiskit/blob/main/CODE_OF_CONDUCT.md).

We use [GitHub issues](https://github.com/Qiskit/qiskit-mitigation/issues/new/choose) for tracking requests and bugs.

## License

[Apache License 2.0](https://github.com/Qiskit/qiskit-mitigation/blob/main/LICENSE.txt)

## Deprecation Policy

We follow [semantic versioning](https://semver.org/). We may occasionally make breaking changes in order to improve the user experience. When possible, we will keep old interfaces and mark them as deprecated, as long as they can co-exist with the new ones.

## References

1. Laurin E. Fischer, et al., [Spacetime mitigation of logical errors](https://arxiv.org/abs/2609.13108), arXiv:2609.13108 \[quant-ph].


## Contents

- 
  - [Documentation home](/docs/addons/qiskit-mitigation)
  - [Installation instructions](/docs/addons/qiskit-mitigation/install)
  - Guides
    - [Gate folding with custom extrapolation](/docs/addons/qiskit-mitigation/guides/gate-folding-with-custom-extrapolation)
    - [PEA with noise learning](/docs/addons/qiskit-mitigation/guides/pea-with-noise-learning)
    - [PEC with TREX](/docs/addons/qiskit-mitigation/guides/pec-with-trex)
    - [Postselection with non-Markovian error checks](/docs/addons/qiskit-mitigation/guides/postselection-with-non-markovian-error-checks)
  - [GitHub](https://github.com/Qiskit/qiskit-mitigation)
- API reference
  - [Python API reference](/docs/api/qiskit-mitigation)