Tutorial: Decoding Quantum Errors on the Steane code with Belief Propagation & Catalyst #1371
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…f Propagation & Catalyst"
…d preview images check-jsonschema \ --schemafile metadata_schemas/demo.metadata.schema.0.1.5.json \ demonstrations/tutorial_bp_catalyst.metadata.json fails but does not return any error messages
Co-authored-by: Paul Finlay <[email protected]>
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| "title": "Decoding Quantum Errors on the Steane code with Belief Propagation & Catalyst", | ||
| "authors": [ | ||
| { | ||
| "username": "tomginsberg" | ||
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| ], | ||
| "dateOfPublication": "2025-05-14T00:00:00+00:00", |
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Co-authored-by: Alan Martin <[email protected]>
svg to png
we were repeating the image
Include hero image and correct missing one
daniela-angulo
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Aug 18, 2025
alvaro-at-xanadu
approved these changes
Aug 18, 2025
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Title: Decoding Quantum Errors on the Steane code with Belief Propagation & Catalyst
Summary:$[[7,1,3]]$
This tutorial walks you through a simplified error correction cycle using the Steane
code. You’ll encode a logical qubit, introduce noise, extract syndromes, and apply decoding using
two different strategies: a simple lookup table and a belief propagation (BP) decoder. Both decoders
are implemented in JAX and JIT-compiled by Catalyst, allowing everything to run inside a single
@qml.qjitcircuit.Relevant references:
Possible Drawbacks:
The tutorial uses a simplified noise model (code capacity) where errors occur only once. Real-world quantum computers have errors at every step (circuit-level noise), which creates a much more complex decoding challenge involving errors in space and time.
Related GitHub Issues:
N/A
If you are writing a demonstration, please answer these questions to facilitate the marketing process.
GOALS — Why are we working on this now?
I work on fault tolerant compilation of quantum circuits which involves making classical decoding algorithms run alongside quantum circuit with measurements and feedforward operations. Catalyst is a great new technology to enable these kinds of high performance hybrid quantum-classical workflows essential for quantum error correction.
AUDIENCE — Who is this for?
KEYWORDS — What words should be included in the marketing post?
quantum error correction,css code,hybrid quantum-classical,belief propagation decoding,JAX,Catalyst(more details here note this requires a Xanadu email to view)
Notes:
suggested thumbail is to make a graphic of the Steane code in it's usual triangle layout
The hero image should have some theme of quantum/classical QEC circuits my idea is roughly this where S is the syndrome and R is the recovery operator:
[sc-93094]