Julia toolkit for open quantum system simulation.
Author USCqserver
29 Stars
Updated Last
1 Year Ago
Started In
December 2018



The official name of this package is "Hamiltonian Open Quantum System Toolkit" (HOQST). To conform with the Julia package name guidelines the code name of the package is OpenQuantumTools. It is a Julia toolkit for simulating the open quantum system dynamics. The package is still under heavy development, and changes in the interface(s) are more than likely to happen. Detailed documentation can be found here. Any pull requests are welcome.


To install, run the following commands inside the Julia REPL:

using Pkg

Alternatively, this can also be done in Julia's Pkg REPL:

(1.5) pkg> add OpenQuantumTools

OpenQuantumTools requires Julia 1.4 or higher. Installing it on an older version of Julia will result in an unsatisfiable requirements error.

Useful Packages

It is recommended to install the following external packages:


Plots is a visualization interface and toolset for Julia. OpenQuantumTools.jl provides several plotting functionality by recipes to Plots.jl.


Even though OpenQuantumTools.jl can function without DifferentialEquations.jl, it needs to be loaded in order for the master equation solvers to work properly. For low dependency usage, replacing DifferentialEquations by OrdinaryDiffEq.jl will also work.


Tutorials and examples can be found in HOQSTTutorials.jl.


The corresponding paper for OpenQuantumTools is

[1] H. Chen and D. A. Lidar, HOQST: Hamiltonian Open Quantum System Toolkit, ArXiv:2011.14046 [Quant-Ph] (2020)

This software is developed as part of academic research. If you use OpenQuantumTools as part of your research, teaching, or other activities, we would be grateful if you could cite our work.


The author thanks Grace Chen for the HOQST logo design.