QuantumToolbox.jl

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ChangeLog ​

All notable changes to QuantumToolbox.jl will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased ​

  • Introduce new methods of sesolve_map and mesolve_map for advanced usage. Users can now customize their own iterator structure, prob_func and output_func. (#565)

v0.37.0 ​

Release date: 2025-10-12

  • Fix cite() bibtex output. (#552)

  • Implement sesolve_map and mesolve_map for solving multiple initial states and parameter sets in parallel. (#554)

  • Add qeye_like and qzero_like, which are synonyms of one and zero. (#555)

  • Add steadystate and DSF benchmarks. The SteadyStateODESOlver tolerances are lowered to terminate_reltol=1e-4 and terminate_abstol=1e-6 to improve speed at the cost of accuracy. (#557)

v0.36.0 ​

Release date: 2025-09-29

  • Add QuantumToolbox.cite() for bibtex generator of QuantumToolbox.jl. (#544)

  • Add sortby and rev keyword arguments to eigensolvers. (#546)

v0.35.0 ​

Release date: 2025-09-03

  • Add support of QobjEvo for steadystate (ODE solver only). (#536)

  • Changes to SteadyStateODESolver. (#537)

    • Introduce the tolerances for steadystate terminate condition (two new fields: terminate_reltol = 1e-5 and terminate_abstol = 1e-7)

    • Fix keyword argument handling for SteadyStateODESolver before passing to mesolve.

  • Fix incorrect negativity and partial_transpose for arbitrary subsystem dimension. (#539)

v0.34.1 ​

Release date: 2025-08-23

  • Improve Bloch sphere rendering for animation. (#520)

  • Add support to Enzyme.jl for sesolve and mesolve. (#531)

v0.34.0 ​

Release date: 2025-07-29

  • Improve efficiency of bloch_redfield_tensor by avoiding unnecessary conversions. (#509)

  • Support SciMLOperators v1.4+. (#470)

  • Fix compatibility with Makie v0.24+. (#513)

  • Add keep_runs_results option for multi-trajectory solvers to align with QuTiP. (#512)

    • Breaking changes for multi-trajectory solutions:

      • the original fields expect and states now store the results depend on keyword argument keep_runs_results (decide whether to store all trajectories results or not).

      • remove field average_expect

      • remove field runs_expect

    • New statistical analysis functions:

      • average_states

      • average_expect

      • std_expect

  • Add support to ForwardDiff.jl for sesolve and mesolve. (#515)

  • Add documentation about automatic differentiation. (#517)

v0.33.0 ​

Release date: 2025-07-22

  • Implement EnrSpace and corresponding functionality. (#500)

  • Check for orthogonality breakdown in Lanczos solver for spectrum. (#501)

  • Store both times and times_states in time evolution solutions. (#506, #504)

  • Fix errors in Julia v1.12. (#507)

v0.32.1 ​

Release date: 2025-06-24

This is a release just for updating documentation.

v0.32.0 ​

Release date: 2025-06-23

  • Introduce Lanczos solver for spectrum. (#476)

  • Add Bloch-Redfield master equation solver. (#473)

  • Implement Bloch Sphere rendering and align style with qutip. (#472, #480, #485, #487, #489)

  • Add Base.copy method for AbstractQuantumObject. (#486)

  • Add documentation for Bloch-Redfield master equation. (#494)

v0.31.1 ​

Release date: 2025-05-16

  • Introduce QuantumToolbox.settings and auto_tidyup. (#460)

v0.31.0 ​

Release date: 2025-05-03

  • Return sesolve when mesolve allows it. (#455)

  • Simplify structure of QuantumObjectTypes. (#456)

v0.30.1 ​

Release date: 2025-04-24

  • Support different length for to and from on GeneralDimensions. (#448)

  • Extend the Makie.jl extension to all the other available backends. (#450)

  • Fix definition of noise derivative in stochastic solvers. (#453)

v0.30.0 ​

Release date: 2025-04-12

  • Make CUDA conversion more general using Adapt.jl. (#436, #437)

  • Make the generation of fock states non-mutating to support Zygote.jl. (#438)

  • Remove Reexport.jl from the dependencies. (#443)

  • Add support for automatic differentiation for sesolve and mesolve. (#440)

v0.29.1 ​

Release date: 2025-03-07

  • Minor changes for GPU matrices element type and word size handling. (#430)

v0.29.0 ​

Release date: 2025-03-07

  • Add support for OperatorKet state input for mesolve and smesolve. (#423)

  • Introduce plot_fock_distribution to plot the population of a state (ket, bra, or density matrix) in its basis (assumed to be Fock basis). (#428)

v0.28.0 ​

Release date: 2025-02-22

  • Support for single AbstractQuantumObject in sc_ops for faster specific method in ssesolve and smesolve. (#408)

  • Change save callbacks from PresetTimeCallback to FunctionCallingCallback. (#410)

  • Align eigenstates and eigenenergies to QuTiP. (#411)

  • Introduce vector_to_operator and operator_to_vector. (#413)

  • Introduce some entropy related functions. (#414, #416)

    • entropy_linear

    • entropy_mutual

    • entropy_conditional

    • entropy_relative

  • Fix entanglement and introduce concurrence. (#414, #418, #419)

  • Introduce some metric functions. (#414, #420)

    • hilbert_dist

    • hellinger_dist

    • bures_dist

    • bures_angle

  • Align steadystate ODE solver to other methods and improve GPU support. (#421)

v0.27.0 ​

Release date: 2025-02-14

  • Rename sparse_to_dense as to_dense and dense_to_sparse as to_sparse. (#392)

  • Fix erroneous definition of the stochastic term in smesolve. (#393)

  • Change name of MultiSiteOperator to multisite_operator. (#394)

  • Fix smesolve for specifying initial state as density matrix. (#395)

  • Add more generic solver for steadystate_floquet to allow more linear solvers. (#396)

  • Fix time evolution output when using saveat keyword argument. (#398)

  • Align some attributes of mcsolve, ssesolve and smesolve results with QuTiP. (#402)

  • Improve ensemble generation of ssesolve and change parameters handling on stochastic processes. (#403)

  • Set default trajectories to 500 and rename the keyword argument ensemble_method to ensemblealg. (#405)

  • Introduce measurement on ssesolve and smesolve. (#404)

v0.26.0 ​

Release date: 2025-02-09

  • Fix CUDA sparse_to_dense. (#386)

  • Improve pseudo inverse spectrum solver. (#388)

  • Add smesolve function for stochastic master equation. (#389)

v0.25.2 ​

Release date: 2025-02-02

  • Move code quality dependencies to separate environment. (#380)

  • Add additional normalization of the state during time evolution of ssesolve. This improves the numerical stability of the solver. (#383)

v0.25.1 ​

Release date: 2025-01-29

  • Fix Dynamical Fock Dimension states saving due to wrong saving of dimensions. (#375)

  • Support a list of observables for expect. (#374, #376)

  • Add checks for tlist in time evolution solvers. The checks are to ensure that tlist is not empty, the elements are in increasing order, and the elements are unique. (#378)

v0.25.0 ​

Release date: 2025-01-20

  • Change the structure of block diagonalization functions, using BlockDiagonalForm struct and changing the function name from bdf to block_diagonal_form. (#349)

  • Add GPUArrays compatibility for ptrace function, by using KernelAbstractions.jl. (#350)

  • Introduce Space, Dimensions, GeneralDimensions structures to support wider definitions and operations of Qobj/QobjEvo, and potential functionalities in the future. (#271, #353, #360)

  • Improve lazy tensor warning for SciMLOperators. (#370)

  • Change order of AbstractQuantumObject data type. For example, from QuantumObject{DataType,ObjType,DimsType} to QuantumObject{ObjType,DimsType,DataType}. (#371)

v0.24.0 ​

Release date: 2024-12-13

  • Improve the construction of QobjEvo. (#338, #339)

  • Support Base.zero and Base.one for AbstractQuantumObject. (#342, #346)

  • Introduce visualization and function plot_wigner for easy plotting of Wigner functions. (#86, #292, #347)

v0.23.1 ​

Release date: 2024-12-06

  • Update [compat] to fix the incompatibility between QuantumToolbox v0.22.0+ and DiffEqCallbacks < v4.2.1. (#335)

v0.23.0 ​

Release date: 2024-12-04

  • Change SingleSiteOperator with the more general MultiSiteOperator. (#324)

  • Make spectrum and correlation functions align with Python QuTiP, introduce spectrum solver PseudoInverse, remove spectrum solver FFTCorrelation, and introduce spectrum_correlation_fft. (#330)

v0.22.0 ​

Release date: 2024-11-20

  • Change the parameters structure of sesolve, mesolve and mcsolve functions to possibly support automatic differentiation. (#311)

  • Fix type instability and reduce extra memory allocation in liouvillian. (#315, #318)

v0.21.5 ​

Release date: 2024-11-15

  • This is a demonstration of how to bump version number and also modify CHANGELOG.md before new release. (#309)

v0.21.4 ​

Release date: 2024-11-13