OQuPy : A Python package to efficiently simulate non-Markovian open quantum systems with process tensors

Tools

Fux, Gerald E. and Fowler-Wright, Piper and Beckles, Joel and Butler, Eoin P. and Eastham, Paul R. and Gribben, Dominic and Keeling, Jonathan and Kilda, Dainius and Kirton, Peter and Lawrence, Ewen D. C. and Lovett, Brendon W. and O'Neill, Eoin and Strathearn, Aidan and de Wit, Roosmarijn (2024) OQuPy : A Python package to efficiently simulate non-Markovian open quantum systems with process tensors. Journal of Chemical Physics, 161 (12). 124108. ISSN 0021-9606 (https://doi.org/10.1063/5.0225367)

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Abstract

Non-Markovian dynamics arising from the strong coupling of a system to a structured environment is essential in many applications of quantum mechanics and emerging technologies. Deriving an accurate description of general quantum dynamics including memory effects is, however, a demanding task, prohibitive to standard analytical or direct numerical approaches. We present a major release of our open source software package, OQuPy (Open Quantum System in Python), which provides several recently developed numerical methods that address this challenging task. It utilizes the process tensor approach to open quantum systems (OQS) in which a single map, the process tensor, captures all possible effects of an environment on the system. The representation of the process tensor in a tensor network form allows for an exact yet highly efficient description of non-Markovian OQS (NM-OQS). The OQuPy package provides methods to (1) compute the dynamics and multi-time correlations of quantum systems coupled to single and multiple environments, (2) optimize control protocols for NM-OQS, (3) simulate interacting chains of NM-OQS, and (4) compute the mean-field dynamics of an ensemble of NM-OQS coupled to a common central system. Our aim is to provide an easily accessible and extensible tool for researchers of OQS in fields such as quantum chemistry, quantum sensing, and quantum information.

ORCID iDs

Fux, Gerald E., Fowler-Wright, Piper, Beckles, Joel, Butler, Eoin P., Eastham, Paul R., Gribben, Dominic, Keeling, Jonathan, Kilda, Dainius, Kirton, Peter ORCID logoORCID: https://orcid.org/0000-0002-3915-1098, Lawrence, Ewen D. C., Lovett, Brendon W., O'Neill, Eoin, Strathearn, Aidan and de Wit, Roosmarijn;

Persistent Identifier

https://doi.org/10.17868/strath.00090756
  • Item type:Article
    ID code:90756
    Dates:
    Date
    Event
    24 September 2024
    Published
    2 September 2024
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:03 Oct 2024 09:11
    Last modified:26 Nov 2024 13:53
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/90756
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