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A python3 library to efficiently compute non-markovian open quantum systems.

Project description


A Python 3 package to efficiently compute non-Markovian open quantum systems.

Binder Build Status codecov Documentation Status Contributor Covenant DOI

This open source project aims to facilitate versatile numerical tools to efficiently compute the dynamics of quantum systems that are possibly strongly coupled to a structured environment. It allows to conveniently apply the so called time evolving matrix product operator method (TEMPO) [1], as well as the process tensor TEMPO method (PT-TEMPO) [2].

  • [1] A. Strathearn, P. Kirton, D. Kilda, J. Keeling and B. W. Lovett, Efficient non-Markovian quantum dynamics using time-evolving matrix product operators, Nat. Commun. 9, 3322 (2018).
  • [2] G. E. Fux, E. Butler, P. R. Eastham, B. W. Lovett, and J. Keeling, Efficient exploration of Hamiltonian parameter space for optimal control of non-Markovian open quantum systems, arXiv2101.03071 (2021).



You can install TimeEvolvingMPO using pip like this:

$ python3 -m pip install time_evolving_mpo

See the documentation for more information.

Quickstart Tutorial


Click the launch binder button above to start a tutorial in a browser based jupyter notebook (no installation required) or checkout the tutorial in the documentation.


Contributions of all kinds are welcome! Get in touch if you ...

  • ... found a bug.
  • ... have a question on how to use the code.
  • ... have a suggestion, on how to improve the code or documentation.
  • ... would like to get involved in writing code or documentation.
  • ... have some other thoughts or suggestions.

Please, feel free to file an issue in the Issues section on GitHub for this. Also, have a look at if you want to get involved in the development.

Citing, Authors and Bibliography

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