---
title: PySTE
tags: Hamiltonian-level
description: A Python package for evolving unitaries and states under the Schrödinger equation using first-order Suzuki-Trotter and computing switching functions.
---

[[/index|Christopher K. Long]]<a href="https://orcid.org/0009-0001-3230-942X"><font color="#a6ce39"><i class='fa-brands fa-orcid'></i></font></a>,
Crispin H. W. Barnes<a href="https://orcid.org/0000-0001-7337-7245"><font color="#a6ce39"><i class='fa-brands fa-orcid'></i></font></a>,
and Normann Mertig<a href="https://orcid.org/0000-0003-3025-7141"><font color="#a6ce39"><i class='fa-brands fa-orcid'></i></font></a>

# Online repositories

- GitHub: https://github.com/Christopher-K-Long/PySTE
- GitLab (mirror): https://gitlab.com/Christopher-K-Long/PySTE
- Zenodo (DOI): https://doi.org/10.5281/zenodo.17116431

# README file

![[Repository/README]]

# Repository files
- [[Repository/README]]
- [[Repository/ChangeLog]]
- [[Repository/SECURITY]]
- [[/Software/PySTE/Repository/LICENSE]]

# Citation

Christopher K. Long, Crispin H. W. Barnes, and Normann Mertig. PySTE, (Zenodo, 2025–2026), DOI: [10.5281/zenodo.17116431](https://doi.org/10.5281/zenodo.17116431).

## BibTeX

```bibtex
@software{long_2025_17393488,
    author       = {Long, Christopher K. and
                    Barnes, Crispin H. W. and
                    Mertig, Normann},
    title        = {PySTE},
    license = {Apache-2.0},
    publisher    = {Zenodo},
    doi          = {10.5281/zenodo.17116431},
    url          = {https://doi.org/10.5281/zenodo.17116431},
    swhid        = {swh:1:dir:3b56737f50e5a3fb539199daf2725196a630ddc0
                    ;origin=https://doi.org/10.5281/zenodo.17116431;vi
                    sit=swh:1:snp:42910d2cf314911d681e3e8c736621fa4232
                    94ce;anchor=swh:1:rel:36a18efe0d29b7382405e8b9e095
                    d13b22083112;path=Christopher-K-Long-PySTE-3e79a04
                    },
}
```

# Dependencies I authored
- [[/Software/Suzuki-Trotter-Evolver/index|Suzuki-Trotter-Evolver]] [@SuzukiTrotterEvolver]