qojulia/QuantumOptics.jl

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Library for the numerical simulation of closed as well as open quantum systems.

Stars: 625
Forks: 144
Open beginner issues: 0
Indexed issues: 44
Avg merge: 7h 41m
Merged PRs (30d): 15

Dominant language: Julia
License: No license data
Last GitHub push: Sep 12, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

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44 open issues indexed

Superradiant laser example: Clarify the interpretation of the collectively pumped model Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

qojulia/QuantumOptics.jl#531 · Opened Jul 23, 2026
Add an efficient LazyEmbed / `embed_lazy` API Open

unitaryhack

Difficulty 5/5 Over a week Newbie friendliness 38/100

qojulia/QuantumOptics.jl#523 · 2 comments · Opened May 12, 2026
Prototype SciMLOperators-backed lazy operators and benchmark them Open

unitaryhack

Difficulty 5/5 Over a week Newbie friendliness 35/100

qojulia/QuantumOptics.jl#522 · 5 comments · 2 reactions · Opened May 12, 2026
Add `QuantumOpticsRepr(lazy=true)` support for LazyOperator output Open

unitaryhack

Difficulty 4/5 3-5 days Newbie friendliness 55/100

qojulia/QuantumOptics.jl#521 · 3 comments · Opened May 12, 2026
Heisenberg picture time evolution Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

qojulia/QuantumOptics.jl#485 · 4 comments · Opened Feb 17, 2026
Implement steadystate API for master_dynamic solver using already existing functions Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

qojulia/QuantumOptics.jl#456 · Opened Jul 13, 2025
Cross-inspiration: Deterministic QKD System with Synchronised Helper Architecture (Open Spec) Open

Difficulty 5/5 Over a week Newbie friendliness 5/100

qojulia/QuantumOptics.jl#451 · Opened Jun 7, 2025
Discrete Time Quantum Walks Extension Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#449 · Opened May 30, 2025
Correctness checks and unit tests for GPU arrays used as storage backend for various states and operators Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

qojulia/QuantumOptics.jl#445 · 1 reaction · Opened May 19, 2025
Run the documentation build as part of the tests and continuous integration Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

qojulia/QuantumOptics.jl#444 · 4 comments · Opened May 19, 2025
interfaces and pkg extensions for KrilovKit and ArnoldiMethods, potential deprecation of Arpack Open

enhancement good first issue help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#439 · Opened Apr 26, 2025
Spurious results with steadystate.iterative for non-linear system Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

qojulia/QuantumOptics.jl#428 · 2 comments · Opened Dec 6, 2024
Clearly document the basis "endiandness" in tensor products and partial traces (and more) and make a comparison table to other julia and python tools and to `kron` in basic linear algebra and tensor network toolkits Open

good first issue

Difficulty 5/5 Over a week Newbie friendliness 35/100

qojulia/QuantumOptics.jl#426 · 9 comments · Opened Nov 30, 2024
Defining Wigner for particle bases Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

qojulia/QuantumOptics.jl#420 · 6 comments · Opened Oct 1, 2024
Split up QuantumOptics by DiffEq dependencies Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#417 · 6 comments · Opened Sep 23, 2024
Add aqua tests Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

qojulia/QuantumOptics.jl#415 · Opened Sep 16, 2024
Documenting SciML interface Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#412 · Opened Aug 15, 2024
Feature: Floquet spectrum Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#408 · 1 comment · 1 reaction · Opened Aug 4, 2024
Update the benchmark suite and bring it into the CI runner [$400] Open

bounty:400 bug bounty

Difficulty 5/5 Over a week Newbie friendliness 35/100

qojulia/QuantumOptics.jl#407 · 7 comments · Opened Aug 1, 2024
Cache input to master derivative functions Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#406 · 3 comments · Opened Jul 31, 2024
Out-of-place functions in semiclassical solvers Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#405 · 2 comments · Opened Jul 31, 2024
Test integrand allocations in timeevolution Open

enhancement good first issue

Difficulty 3/5 1-2 days Newbie friendliness 45/100

qojulia/QuantumOptics.jl#399 · Opened Jun 15, 2024
Error when multiplying multiple TimeDependentOperators Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#398 · Opened Jun 13, 2024
better error message when the Hamiltonian or Lindblad function are not of the necessary output type (currently we just get an confusing assert error) Open

error messages good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

qojulia/QuantumOptics.jl#387 · 1 comment · Opened Apr 25, 2024
Possible hard wall boundary condition for particle? Open

good first issue

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#380 · 3 comments · Opened Feb 8, 2024
Missing details about default solver options Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

qojulia/QuantumOptics.jl#516 · 2 comments · Opened Dec 28, 2023
Sparse state matrices given to the various solvers lead to poor performance - we should either provide a warning or automatically call `dense` Open

enhancement help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#379 · 3 comments · Opened Dec 28, 2023
ForwardDiff fails on (schroedinger_dynamic with) TimeDependentOperator Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#376 · 6 comments · Opened Dec 16, 2023
krylov methods Open

help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#364 · 5 comments · Opened Jun 15, 2023
Create an animation / more intuitive example for 2D time dependent schrodinger equation Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

qojulia/QuantumOptics.jl#361 · 1 reaction · Opened Mar 15, 2023
Adding ForwardDiff support for all solvers Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

qojulia/QuantumOptics.jl#357 · 1 comment · 1 reaction · Opened Jan 1, 2023
``potentialoperator()`` could use better documentation Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#351 · 7 comments · Opened Dec 5, 2022
A confusion aroused by the sample 4 from official manual Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

qojulia/QuantumOptics.jl#348 · 1 comment · Opened Nov 14, 2022
Incorrect Gaussian state Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

qojulia/QuantumOptics.jl#345 · 2 comments · Opened Oct 21, 2022
ParticuleBasis Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#339 · 2 comments · Opened Aug 19, 2022
Direct steadystate solver Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

qojulia/QuantumOptics.jl#338 · 1 comment · Opened Jul 26, 2022
`mul!()` of `LazyProduct` result in high alloc in integration Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#333 · 10 comments · Opened Apr 30, 2022
Tiny error in documentation Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

qojulia/QuantumOptics.jl#517 · Opened Apr 14, 2022
Project on a subsystem and drop it? i.e. how do I perform `(⟨a|⊗Id)*(|b⟩⊗|c⟩) → (⟨a|b⟩)|c⟩` Open

qojulia/QuantumOptics.jl#322 · 15 comments · 1 reaction · 1 assignee · Opened Sep 23, 2021
MCWF evolution using density matrices Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#321 · 3 comments · Opened Sep 10, 2021
Support to work with modeling toolkit and symbolics Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

qojulia/QuantumOptics.jl#320 · 2 comments · Opened Aug 13, 2021
Get the `DifferentialEquations.jl` problem object Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

qojulia/QuantumOptics.jl#298 · 16 comments · 2 reactions · Opened Apr 1, 2021
Support for measurements Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

qojulia/QuantumOptics.jl#296 · 5 comments · Opened Feb 19, 2021
Correlation function without given list of times fails in spectrum FFT Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

qojulia/QuantumOptics.jl#224 · Opened Jul 12, 2018

qojulia/QuantumOptics.jl

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