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qLDPCOrg

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qLDPC
Tools for constructing and analyzing quantum low density parity check (qLDPC) codes. Also stabilizer and subsystem codes more broadly.

Python · 255 stars

Beginner friendly Everything

Open All

Support the use of `pymatching-correlated` Open

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

qLDPCOrg/qLDPC#498 · Opened Jun 1, 2026
QLDPC Compiler Module Open

circuits enhancement help wanted high desirability

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

qLDPCOrg/qLDPC#440 · 6 comments · Opened Apr 7, 2026
Add example: computing logical error rates of individual logical operators in a memory experiment. Open

enhancement example

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

qLDPCOrg/qLDPC#434 · 3 comments · Opened Apr 3, 2026
Use `ty` instead of `mypy` Open

hygiene

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

qLDPCOrg/qLDPC#407 · 1 comment · Opened Dec 30, 2025
Use a local installation of MAGMA, if available Open

enhancement

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

qLDPCOrg/qLDPC#389 · Opened Oct 23, 2025
Better API for choosing a decoder Open

decoders high desirability

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

qLDPCOrg/qLDPC#359 · 10 comments · Opened Sep 2, 2025
Add quandum data-syndrome codes (`QDSCode`) Open

new codes

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

qLDPCOrg/qLDPC#356 · Opened Aug 31, 2025
Support subsystem code memory experiments Open

circuits enhancement

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

qLDPCOrg/qLDPC#348 · 2 comments · Opened Aug 28, 2025
Add fault tolerant logical state preparation circuits Open

circuits high desirability

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

qLDPCOrg/qLDPC#327 · 3 comments · Opened Aug 11, 2025
standardizing decoder performance results Open

enhancement

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

qLDPCOrg/qLDPC#311 · 4 comments · Opened Jul 31, 2025
Add balanced product codes Open

new codes

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

qLDPCOrg/qLDPC#305 · Opened Jul 20, 2025
Add fault tolerant syndrome measurement strategies Open

circuits high priority

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

qLDPCOrg/qLDPC#304 · 1 comment · Opened Jul 20, 2025
Add abelian multi-cycle codes Open

new codes

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

qLDPCOrg/qLDPC#303 · Opened Jul 20, 2025
GAP integration for Windows Open

Windows support

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

qLDPCOrg/qLDPC#294 · 6 comments · Opened Jun 24, 2025
Use libgap Open

high desirability performance

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

qLDPCOrg/qLDPC#275 · 3 comments · Opened May 22, 2025
Add `abstract.GeneralLinearGroup` and `abstract.ProjectiveGeneralLinearGroup` Open

enhancement

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

qLDPCOrg/qLDPC#274 · Opened May 21, 2025
Add tools to build a tensor network code Open

enhancement

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

qLDPCOrg/qLDPC#272 · 1 comment · Opened May 21, 2025
Faster implementation of RingArray Open

performance

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

qLDPCOrg/qLDPC#266 · 1 comment · Opened May 14, 2025
Add support for Ambiguity Clustering (AC) decoding Open

decoders

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

qLDPCOrg/qLDPC#123 · Opened Jul 25, 2024
Integrate with SSIP for code surgery Open

circuits

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

qLDPCOrg/qLDPC#122 · Opened Jul 19, 2024
Use the Brouwer-Zimmermann algorithm to compute code distance Open

high desirability performance

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

qLDPCOrg/qLDPC#118 · 2 comments · Opened Jul 9, 2024
Add generalized quantum Tanner codes Open

new codes

qLDPCOrg/qLDPC#116 · 3 comments · 1 assignee · Opened Jun 28, 2024
Implement "quantum Tanner transformation" for `HGPCode`s and `LPCode`s Open

enhancement

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

qLDPCOrg/qLDPC#113 · 23 comments · Opened Jun 8, 2024
Add stabilizer weight reduction methods Open

enhancement

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

qLDPCOrg/qLDPC#109 · Opened Jun 8, 2024
Make docstrings compatible with Read the Docs formatting Open

documentation high desirability

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

qLDPCOrg/qLDPC#102 · Opened Jun 8, 2024
Support Floquet (and possibly more general dynamical) codes Open

enhancement

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

qLDPCOrg/qLDPC#99 · Opened Jun 8, 2024

qLDPCOrg

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