Joschka Roffe

@qec.codes

Quantum Error Correction | Quantum Software Lab | University of Edinburgh Homepage: https://roffe.eu

๐Ÿ“ข New paper. ๐—ก๐—ฒ๐—ฎ๐—ฟ๐—ฒ๐˜€๐˜-๐—ป๐—ฒ๐—ถ๐—ด๐—ต๐—ฏ๐—ผ๐˜‚๐—ฟ ๐—ด๐—ฎ๐˜๐—ฒ๐˜€ ๐—ฎ๐—ฟ๐—ฒ ๐—ฎ๐—น๐—น ๐˜†๐—ผ๐˜‚ ๐—ป๐—ฒ๐—ฒ๐—ฑ: ๐—›๐—ถ๐—ด๐—ต-๐—ฟ๐—ฎ๐˜๐—ฒ ๐—พ๐˜‚๐—ฎ๐—ป๐˜๐˜‚๐—บ ๐—น๐—ผ๐˜„-๐—ฑ๐—ฒ๐—ป๐˜€๐—ถ๐˜๐˜† ๐—ฝ๐—ฎ๐—ฟ๐—ถ๐˜๐˜†-๐—ฐ๐—ต๐—ฒ๐—ฐ๐—ธ ๐—ฐ๐—ผ๐—ฑ๐—ฒ๐˜€ ๐—ผ๐—ป ๐—ฎ ๐—ฝ๐—น๐—ฎ๐—ป๐—ฎ๐—ฟ ๐—ด๐—ฟ๐—ถ๐—ฑ. scirate.com/arxiv/2606.1... ๐˜๐—น๐—ฑ๐—ฟ; For several years now, we have been advocating for qLDPC codes as a resource-efficient alternative to the surface code. 1/3

Nearest-neighbour gates are all you need: High-rate quantum low-density parity-check codes on a planar grid

High-performance quantum low-density parity-check codes promise substantial reductions in the overhead of fault-tolerant quantum computation, but most constructions require long-range connectivity or ...

scirate.com

๐Ÿ“ข New paper. ๐๐†๐๐”: ๐๐š๐ซ๐š๐ฅ๐ฅ๐ž๐ฅ ๐ฅ๐จ๐ ๐ข๐œ ๐ข๐ง ๐ช๐ฎ๐š๐ง๐ญ๐ฎ๐ฆ ๐‹๐ƒ๐๐‚ ๐œ๐จ๐๐ž๐ฌ. A great collaboration w/ Boren Gu, Andi Lui, Armanda Quintavalle, Xian Xu, & @jenseisert.bsky.social ๐ญ๐ฅ๐๐ซ; Quantum LDPC codes are an exciting architecture for fault-tolerant ... 1/n scirate.com/arxiv/2603.0...

QGPU: Parallel logic in quantum LDPC codes

Quantum error correction is critical to the design and manufacture of scalable quantum computing systems. Recently, there has been growing interest in quantum low-density parity-check codes as a resou...

scirate.com

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...

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....

nature.com

๐Ÿ“ข Our paper, ๐—Ÿ๐—ผ๐—ฐ๐—ฎ๐—น๐—ถ๐˜€๐—ฒ๐—ฑ ๐˜€๐˜๐—ฎ๐˜๐—ถ๐˜€๐˜๐—ถ๐—ฐ๐˜€ ๐—ฑ๐—ฒ๐—ฐ๐—ผ๐—ฑ๐—ถ๐—ป๐—ด ๐—ณ๐—ผ๐—ฟ ๐—พ๐˜‚๐—ฎ๐—ป๐˜๐˜‚๐—บ ๐—น๐—ผ๐˜„-๐—ฑ๐—ฒ๐—ป๐˜€๐—ถ๐˜๐˜† ๐—ฝ๐—ฎ๐—ฟ๐—ถ๐˜๐˜†-๐—ฐ๐—ต๐—ฒ๐—ฐ๐—ธ ๐—ฐ๐—ผ๐—ฑ๐—ฒ๐˜€, is now published in Nature Communications (Nature Portfolio). Great to see it in print! 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....

nature.com

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!

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๐Ÿ“ฃ 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...

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