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qojulia

6 indexed repositories · View on GitHub

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

Julia · 625 stars
QuantumCumulants.jl
Generalized mean-field equations in open quantum systems

Julia · 88 stars
QuantumOpticsBase.jl
Base functionality library for QuantumOptics.jl

Julia · 68 stars
SecondQuantizedAlgebra.jl
Symbolic computations with second quantized operators

Julia · 13 stars
QuantumInterface.jl
Lightweight interface for Quantum Physics related packages

Julia · 8 stars
QuantumInputOutput.jl
A Framework for the Input-Output Formalism with Quantum Pulses

Julia · 7 stars

Beginner friendly Everything

Open All

Add direct static numeric functional calculus for QExpr Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 42/100

qojulia/SecondQuantizedAlgebra.jl#268 · Opened Sep 10, 2026
Add explicit finite-order BCH / Schrieffer–Wolff conjugation Open

enhancement Unitary_transformations

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

qojulia/SecondQuantizedAlgebra.jl#267 · 1 comment · Opened Sep 10, 2026
feat: make folded and holomorphic MomentIR representations explicit Open

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

qojulia/QuantumCumulants.jl#354 · Opened Sep 8, 2026
feat: preserve hierarchy and provenance metadata for structure-aware MomentIR consumers Open

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

qojulia/QuantumCumulants.jl#353 · Opened Sep 8, 2026
feat: expose a supported MomentIR interface for external numerical consumers Open

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

qojulia/QuantumCumulants.jl#352 · Opened Sep 8, 2026
Roadmap: make MomentIR the shared structured interface for numerical consumers Open

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

qojulia/QuantumCumulants.jl#351 · Opened Sep 8, 2026
bug: effective_input_mode uses target coupling in i>2 cross term Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

qojulia/QuantumInputOutput.jl#71 · Opened Sep 8, 2026
perf: scale higher-order cumulant hierarchy construction and closure Open

performance

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

qojulia/QuantumCumulants.jl#345 · 3 comments · Opened Sep 7, 2026
perf: support batched and deployable execution of compiled MomentIR models Open

performance

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

qojulia/QuantumCumulants.jl#344 · Opened Sep 7, 2026
perf: compile parameter, coefficient, and sensitivity kernels for MomentIR Open

performance

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

qojulia/QuantumCumulants.jl#343 · 1 comment · Opened Sep 7, 2026
perf: scale transient moment integration with structured Jacobian linear algebra Open

performance

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

qojulia/QuantumCumulants.jl#341 · Opened Sep 7, 2026
docu eq. minus sign Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

qojulia/QuantumInputOutput.jl#65 · Opened Sep 7, 2026
Build exact dressed bases and extensible spectral decompositions Open

Unitary_transformations

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

qojulia/SecondQuantizedAlgebra.jl#253 · Opened Sep 5, 2026
Support sin, cos, and expim of noncommutative operator expressions Open

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

qojulia/SecondQuantizedAlgebra.jl#250 · Opened Sep 3, 2026
Tensor Product Conflict with QuantumToolbox.jl. Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

qojulia/SecondQuantizedAlgebra.jl#238 · 11 comments · Opened Aug 25, 2026
make the manual list all docstrings and remove the api pages Open

documentation

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

qojulia/SecondQuantizedAlgebra.jl#235 · Opened Aug 15, 2026
Generalize canonical maps to indexed and collective algebras Open

enhancement Unitary_transformations

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

qojulia/SecondQuantizedAlgebra.jl#234 · Opened Aug 15, 2026
Model partial polynomial maps and approximate numerical transformations explicitly Open

enhancement Unitary_transformations

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

qojulia/SecondQuantizedAlgebra.jl#232 · Opened Aug 11, 2026
Clarify traceout! semantics relative to ptrace across simulator backends Open

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

qojulia/QuantumInterface.jl#89 · Opened Aug 7, 2026
Conversion to real equations Open

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

qojulia/QuantumCumulants.jl#325 · Opened Jul 24, 2026
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
Support extensible/custom moment-closure strategies Open

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

qojulia/QuantumCumulants.jl#318 · 1 comment · Opened Jul 21, 2026
Abstract circuit expressions with decomposition Open

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

qojulia/QuantumInputOutput.jl#29 · Opened Jul 11, 2026
Add High-Level Delay-Line and Interferometer APIs Open

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

qojulia/QuantumInputOutput.jl#25 · Opened Jun 26, 2026
Add Named-Port Network Builder Open

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

qojulia/QuantumInputOutput.jl#24 · Opened Jun 26, 2026
Add high-level constructors for common SLH components Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

qojulia/QuantumInputOutput.jl#23 · Opened Jun 26, 2026
Missing operators Open

operators

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

qojulia/SecondQuantizedAlgebra.jl#195 · Opened Jun 25, 2026
scale: per-distinct-leaf average↔QAdd round-trip dominates allocations Open

performance

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

qojulia/QuantumCumulants.jl#297 · 1 comment · Opened Jun 21, 2026
ShardedForm codegen ~6.7× faster Open

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

qojulia/QuantumCumulants.jl#294 · 14 comments · Opened Jun 16, 2026
Closure diagnostics: explain why a cumulant hierarchy grows Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

qojulia/QuantumCumulants.jl#287 · Opened Jun 15, 2026
Index arithmetic / nearest-neighbour shifts Open

enhancement indexing

Difficulty 4/5 3-5 days Newbie friendliness 48/100

qojulia/SecondQuantizedAlgebra.jl#149 · Opened Jun 1, 2026
JSON serialization Open

enhancement

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

qojulia/SecondQuantizedAlgebra.jl#145 · Opened Jun 1, 2026
Coherent state expectations Open

enhancement expect

Difficulty 3/5 1-2 days Newbie friendliness 65/100

qojulia/SecondQuantizedAlgebra.jl#144 · Opened Jun 1, 2026
Vacuum expectation value `vev` Open

enhancement expect

Difficulty 3/5 1-2 days Newbie friendliness 20/100

qojulia/SecondQuantizedAlgebra.jl#143 · Opened Jun 1, 2026
Lazy `Commutator` head Open

enhancement operators

Difficulty 5/5 Over a week Newbie friendliness 42/100

qojulia/SecondQuantizedAlgebra.jl#138 · Opened Jun 1, 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
TagBot: Manual intervention needed for releases Open

tagbot-manual

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

qojulia/QuantumOpticsBase.jl#225 · Opened Apr 23, 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
cross-correlation function Open

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

qojulia/QuantumCumulants.jl#267 · 2 comments · Opened Nov 20, 2025
Adding Support for Operator Functions Open

enhancement

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

qojulia/SecondQuantizedAlgebra.jl#64 · 4 comments · Opened Oct 9, 2025
Enable AMDGPU tests in CI Open

enhancement help wanted

Difficulty 4/5 3-5 days Newbie friendliness 38/100

qojulia/QuantumOpticsBase.jl#206 · Opened Aug 17, 2025
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
Clarifying the `express` interface Open

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

qojulia/QuantumInterface.jl#56 · 4 comments · Opened Apr 26, 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

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