Joschka Roffe
@qec.codes
Quantum Error Correction | Quantum Software Lab | University of Edinburgh
Homepage: https://roffe.eu
Homepage: https://roffe.eu
Pinned
Joschka Roffe
@qec.codes
· Apr 14
Happy World Quantum Day! I'm excited to announce that I will be starting a new group dedicated to quantum error correction (QEC) at The University of Edinburgh Quantum Software Lab, funded by an EPSRC Quantum Technology Career Acceleration Fellowship!
Reposted by Joschka Roffe
Working on LSD was fun! - Our paper on Localized statistics decoding (LSD) for qLDPC codes is now in print.
LSD is a highly parallelizable, reliability-guided inversion decoder that exploits the clustering of errors. Think of it as a parallel version of OSD.
www.nature.com/articles/s41...
LSD is a highly parallelizable, reliability-guided inversion decoder that exploits the clustering of errors. Think of it as a parallel version of OSD.
www.nature.com/articles/s41...
Localized statistics decoding for quantum low-density parity-check codes - Nature Communications
Quantum low-density parity-check (QLDPC) codes offer lower overhead than topological quantum error-correcting codes, but decoding remains a key challenge for scalable fault-tolerant quantum computing....
www.nature.com
September 3, 2025 at 3:47 PM
Working on LSD was fun! - Our paper on Localized statistics decoding (LSD) for qLDPC codes is now in print.
LSD is a highly parallelizable, reliability-guided inversion decoder that exploits the clustering of errors. Think of it as a parallel version of OSD.
www.nature.com/articles/s41...
LSD is a highly parallelizable, reliability-guided inversion decoder that exploits the clustering of errors. Think of it as a parallel version of OSD.
www.nature.com/articles/s41...
📢 Our paper, 𝗟𝗼𝗰𝗮𝗹𝗶𝘀𝗲𝗱 𝘀𝘁𝗮𝘁𝗶𝘀𝘁𝗶𝗰𝘀 𝗱𝗲𝗰𝗼𝗱𝗶𝗻𝗴 𝗳𝗼𝗿 𝗾𝘂𝗮𝗻𝘁𝘂𝗺 𝗹𝗼𝘄-𝗱𝗲𝗻𝘀𝗶𝘁𝘆 𝗽𝗮𝗿𝗶𝘁𝘆-𝗰𝗵𝗲𝗰𝗸 𝗰𝗼𝗱𝗲𝘀, is now published in Nature Communications (Nature Portfolio). Great to see it in print!
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Localized statistics decoding for quantum low-density parity-check codes - Nature Communications
Quantum low-density parity-check (QLDPC) codes offer lower overhead than topological quantum error-correcting codes, but decoding remains a key challenge for scalable fault-tolerant quantum computing....
www.nature.com
September 3, 2025 at 10:34 AM
📢 Our paper, 𝗟𝗼𝗰𝗮𝗹𝗶𝘀𝗲𝗱 𝘀𝘁𝗮𝘁𝗶𝘀𝘁𝗶𝗰𝘀 𝗱𝗲𝗰𝗼𝗱𝗶𝗻𝗴 𝗳𝗼𝗿 𝗾𝘂𝗮𝗻𝘁𝘂𝗺 𝗹𝗼𝘄-𝗱𝗲𝗻𝘀𝗶𝘁𝘆 𝗽𝗮𝗿𝗶𝘁𝘆-𝗰𝗵𝗲𝗰𝗸 𝗰𝗼𝗱𝗲𝘀, is now published in Nature Communications (Nature Portfolio). Great to see it in print!
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Your wish will be fufilled: this will be in arXiv V2 👀
Color code decoding with some big claim: arxiv.org/abs/2508.15743
I wish they could try to benchmark this decoder against the experimental color code data from arxiv.org/pdf/2412.14256 zenodo.org/records/1423...
We are releasing experimental data so people can try out their decoding algorithms!
I wish they could try to benchmark this decoder against the experimental color code data from arxiv.org/pdf/2412.14256 zenodo.org/records/1423...
We are releasing experimental data so people can try out their decoding algorithms!
Colour Codes Reach Surface Code Performance using Vibe Decoding
Two-dimensional quantum colour codes hold significant promise for quantum error correction, offering advantages such as planar connectivity and low overhead logical gates. Despite their theoretical ap...
arxiv.org
August 23, 2025 at 4:28 PM
Your wish will be fufilled: this will be in arXiv V2 👀
Reposted by Joschka Roffe
Color code decoding with some big claim: arxiv.org/abs/2508.15743
I wish they could try to benchmark this decoder against the experimental color code data from arxiv.org/pdf/2412.14256 zenodo.org/records/1423...
We are releasing experimental data so people can try out their decoding algorithms!
I wish they could try to benchmark this decoder against the experimental color code data from arxiv.org/pdf/2412.14256 zenodo.org/records/1423...
We are releasing experimental data so people can try out their decoding algorithms!
Colour Codes Reach Surface Code Performance using Vibe Decoding
Two-dimensional quantum colour codes hold significant promise for quantum error correction, offering advantages such as planar connectivity and low overhead logical gates. Despite their theoretical ap...
arxiv.org
August 22, 2025 at 11:41 PM
Color code decoding with some big claim: arxiv.org/abs/2508.15743
I wish they could try to benchmark this decoder against the experimental color code data from arxiv.org/pdf/2412.14256 zenodo.org/records/1423...
We are releasing experimental data so people can try out their decoding algorithms!
I wish they could try to benchmark this decoder against the experimental color code data from arxiv.org/pdf/2412.14256 zenodo.org/records/1423...
We are releasing experimental data so people can try out their decoding algorithms!
Reposted by Joschka Roffe
The QEC25 conference hosted by @yaleqi.bsky.social was really excellent, and videos of all talks are available. So much recent progress on quantum error correction!
qec25.yalepages.org
qec25.yalepages.org
QEC25
qec25.yalepages.org
August 17, 2025 at 5:32 PM
The QEC25 conference hosted by @yaleqi.bsky.social was really excellent, and videos of all talks are available. So much recent progress on quantum error correction!
qec25.yalepages.org
qec25.yalepages.org
James Mills introducing Logical Accreditation to #QEC2025 at @yaleqi.bsky.social
See our recent preprint here: arxiv.org/abs/2508.05523
See our recent preprint here: arxiv.org/abs/2508.05523
August 12, 2025 at 5:42 PM
James Mills introducing Logical Accreditation to #QEC2025 at @yaleqi.bsky.social
See our recent preprint here: arxiv.org/abs/2508.05523
See our recent preprint here: arxiv.org/abs/2508.05523
Reposted by Joschka Roffe
Check out the V2 of our qLDPC decoding paper "An almost-linear time decoding algorithm for quantum LDPC codes under circuit-level noise". The meme summarizes our approach. @qec.codes
August 6, 2025 at 11:33 AM
Check out the V2 of our qLDPC decoding paper "An almost-linear time decoding algorithm for quantum LDPC codes under circuit-level noise". The meme summarizes our approach. @qec.codes
Reposted by Joschka Roffe
Hardware-tailored logical Clifford circuits for stabilizer codes
scirate.com/arxiv/2505.2...
This first first author paper of Eric appeared yesterday, but was not picked up by Scirate. It suggests novel strategies for implementing logical Cliffords of stabilizer codes under hardware constraints.
scirate.com/arxiv/2505.2...
This first first author paper of Eric appeared yesterday, but was not picked up by Scirate. It suggests novel strategies for implementing logical Cliffords of stabilizer codes under hardware constraints.
May 28, 2025 at 5:53 AM
Hardware-tailored logical Clifford circuits for stabilizer codes
scirate.com/arxiv/2505.2...
This first first author paper of Eric appeared yesterday, but was not picked up by Scirate. It suggests novel strategies for implementing logical Cliffords of stabilizer codes under hardware constraints.
scirate.com/arxiv/2505.2...
This first first author paper of Eric appeared yesterday, but was not picked up by Scirate. It suggests novel strategies for implementing logical Cliffords of stabilizer codes under hardware constraints.
Reposted by Joschka Roffe
Hardware-tailored logical Clifford circuits for stabilizer codes
arxiv.org/abs/2505.20261
It is important to identify strategies for implementing Clifford unitaries at the logical level of stabilizer codes in #quantumerrorcorrection, respecting hardware constraints. Here is one such strategy.
arxiv.org/abs/2505.20261
It is important to identify strategies for implementing Clifford unitaries at the logical level of stabilizer codes in #quantumerrorcorrection, respecting hardware constraints. Here is one such strategy.
May 27, 2025 at 8:28 AM
Hardware-tailored logical Clifford circuits for stabilizer codes
arxiv.org/abs/2505.20261
It is important to identify strategies for implementing Clifford unitaries at the logical level of stabilizer codes in #quantumerrorcorrection, respecting hardware constraints. Here is one such strategy.
arxiv.org/abs/2505.20261
It is important to identify strategies for implementing Clifford unitaries at the logical level of stabilizer codes in #quantumerrorcorrection, respecting hardware constraints. Here is one such strategy.
📣 New pre-print on the arXiv today on generalisation of surface code lattice surgery to arbitrary CSS codes w/ Clément Poirson and Robert Booth. Congrats to @clemenson7.bsky.social on his first paper! 🎉
So here it is, my first first-author paper is live on the arXiv arxiv.org/abs/2505.01370
Engineering CSS surgery: a fault-tolerant CNOT for any CSS codes
We introduce a framework for implementing logic in CSS-style quantum error correction codes, building on the surgery methods of Cowtan and Burton [CB24]. Our approach offers a systematic methodology f...
arxiv.org
May 5, 2025 at 1:50 PM
📣 New pre-print on the arXiv today on generalisation of surface code lattice surgery to arbitrary CSS codes w/ Clément Poirson and Robert Booth. Congrats to @clemenson7.bsky.social on his first paper! 🎉
Happy World Quantum Day! I'm excited to announce that I will be starting a new group dedicated to quantum error correction (QEC) at The University of Edinburgh Quantum Software Lab, funded by an EPSRC Quantum Technology Career Acceleration Fellowship!
April 14, 2025 at 3:25 PM
Happy World Quantum Day! I'm excited to announce that I will be starting a new group dedicated to quantum error correction (QEC) at The University of Edinburgh Quantum Software Lab, funded by an EPSRC Quantum Technology Career Acceleration Fellowship!
📣 New paper: Computing Efficiently in QLDPC Codes w/ @TeamPhotonic! Lots of great stuff here:
- New subsystem codes w/ transversal gates that efficiently compile full Clifford Group.
- Single-shot decoding
- Huge circuit-level logic sims
scirate.com/arxiv/2502.0...
- New subsystem codes w/ transversal gates that efficiently compile full Clifford Group.
- Single-shot decoding
- Huge circuit-level logic sims
scirate.com/arxiv/2502.0...
Computing Efficiently in QLDPC Codes
It is the prevailing belief that quantum error correcting techniques will be required to build a utility-scale quantum computer able to perform computations that are out of reach of classical computer...
scirate.com
February 12, 2025 at 11:32 AM
📣 New paper: Computing Efficiently in QLDPC Codes w/ @TeamPhotonic! Lots of great stuff here:
- New subsystem codes w/ transversal gates that efficiently compile full Clifford Group.
- Single-shot decoding
- Huge circuit-level logic sims
scirate.com/arxiv/2502.0...
- New subsystem codes w/ transversal gates that efficiently compile full Clifford Group.
- Single-shot decoding
- Huge circuit-level logic sims
scirate.com/arxiv/2502.0...
🚨Reminder: The deadline to apply for the Quantum Informatics CDT is tomorrow (15th Jan). Apply below 👇
www.quantuminformatics-cdt.ac.uk
www.quantuminformatics-cdt.ac.uk
QI CDT – EPSRC Centre for Doctoral Training in Quantum Informatics
www.quantuminformatics-cdt.ac.uk
January 14, 2025 at 3:00 PM
🚨Reminder: The deadline to apply for the Quantum Informatics CDT is tomorrow (15th Jan). Apply below 👇
www.quantuminformatics-cdt.ac.uk
www.quantuminformatics-cdt.ac.uk
Reposted by Joschka Roffe
Submissions for QEC 2025 are now open through March 28.
This will easily be the most exciting conference on quantum error correction yet!
Conference homepage:
qec25.yalepages.org
EasyChair submission page:
easychair.org/my/conferenc...
This will easily be the most exciting conference on quantum error correction yet!
Conference homepage:
qec25.yalepages.org
EasyChair submission page:
easychair.org/my/conferenc...
QEC25
qec25.yalepages.org
January 11, 2025 at 1:23 AM
Submissions for QEC 2025 are now open through March 28.
This will easily be the most exciting conference on quantum error correction yet!
Conference homepage:
qec25.yalepages.org
EasyChair submission page:
easychair.org/my/conferenc...
This will easily be the most exciting conference on quantum error correction yet!
Conference homepage:
qec25.yalepages.org
EasyChair submission page:
easychair.org/my/conferenc...
Reposted by Joschka Roffe
Submissions for QCTiP 2025 are now open.
December 5, 2024 at 10:45 AM
Submissions for QCTiP 2025 are now open.
🎓 PhD in Quantum Error Correction
Applications are open for a 4-year collaborative PhD between @edinburghuni.bsky.social and the NQCC.
Project: designing QEC protocols and decoders for the NQCC's neutral atom quantum computing systems.
Apply by Jan 31 👇
informatics.ed.ac.uk/study-with-u...
Applications are open for a 4-year collaborative PhD between @edinburghuni.bsky.social and the NQCC.
Project: designing QEC protocols and decoders for the NQCC's neutral atom quantum computing systems.
Apply by Jan 31 👇
informatics.ed.ac.uk/study-with-u...
PhD studentship in Quantum Error Correction
Deadline: 31 January 2025 (or until the position is filled)
informatics.ed.ac.uk
December 3, 2024 at 7:53 PM
🎓 PhD in Quantum Error Correction
Applications are open for a 4-year collaborative PhD between @edinburghuni.bsky.social and the NQCC.
Project: designing QEC protocols and decoders for the NQCC's neutral atom quantum computing systems.
Apply by Jan 31 👇
informatics.ed.ac.uk/study-with-u...
Applications are open for a 4-year collaborative PhD between @edinburghuni.bsky.social and the NQCC.
Project: designing QEC protocols and decoders for the NQCC's neutral atom quantum computing systems.
Apply by Jan 31 👇
informatics.ed.ac.uk/study-with-u...
I've enjoyed teaching students at Edinburgh University about QEC this term. Here I am introducing the famous [[9,1,3]] Shor code.
![The circuit for the [[9,1,3]] Shor code. This QEC protocol is constructed by concatenating the 3-qubit phase-flip repetition code with the 3-qubit bit-flip repetition code.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:pdmdqh5ni2osvflrjof2qaai/bafkreify72e4gkxhuxip4bj4knsi7sj3prtnnlic466qfwx4ggjpfib4ye@jpeg)
November 21, 2024 at 11:00 AM
I've enjoyed teaching students at Edinburgh University about QEC this term. Here I am introducing the famous [[9,1,3]] Shor code.
📢PhD Positions in Quantum Computing
Applications are now open for the new CDT in Quantum Informatics. We are recruiting 16 students to start Sept 2025. Positions are fully funded for 4 years. Apply now:
quantuminformatics-cdt.ac.uk
Applications are now open for the new CDT in Quantum Informatics. We are recruiting 16 students to start Sept 2025. Positions are fully funded for 4 years. Apply now:
quantuminformatics-cdt.ac.uk
QI CDT – EPSRC Centre for Doctoral Training in Quantum Informatics
quantuminformatics-cdt.ac.uk
November 20, 2024 at 6:10 PM
📢PhD Positions in Quantum Computing
Applications are now open for the new CDT in Quantum Informatics. We are recruiting 16 students to start Sept 2025. Positions are fully funded for 4 years. Apply now:
quantuminformatics-cdt.ac.uk
Applications are now open for the new CDT in Quantum Informatics. We are recruiting 16 students to start Sept 2025. Positions are fully funded for 4 years. Apply now:
quantuminformatics-cdt.ac.uk