Anybody discussing quantum LDPC codes or bosonic codes around here?
November 18, 2024 at 11:55 AM
Anybody discussing quantum LDPC codes or bosonic codes around here?
Super happy to see our work on the LDPC cat architecture published! What's not to love about cat qubit and LDPC codes?
Great collaboration with @diego-ruiz.bsky.social @christophe.vuillot.info Jérémie Guillaud and Mazyar Mirrahimi
rdcu.be/d7wtt
Great collaboration with @diego-ruiz.bsky.social @christophe.vuillot.info Jérémie Guillaud and Mazyar Mirrahimi
rdcu.be/d7wtt
LDPC-cat codes for low-overhead quantum computing in 2D
Nature Communications - Implementing full quantum error correction incurs a significant hardware overhead. Here, the authors propose a quantum computing architecture combining superconducting cat...
rdcu.be
January 27, 2025 at 7:48 PM
Super happy to see our work on the LDPC cat architecture published! What's not to love about cat qubit and LDPC codes?
Great collaboration with @diego-ruiz.bsky.social @christophe.vuillot.info Jérémie Guillaud and Mazyar Mirrahimi
rdcu.be/d7wtt
Great collaboration with @diego-ruiz.bsky.social @christophe.vuillot.info Jérémie Guillaud and Mazyar Mirrahimi
rdcu.be/d7wtt
Happy to announce our newest result on LDPC code based architectures 🧊
scirate.com/arxiv/2602.1...
scirate.com/arxiv/2602.1...
February 13, 2026 at 6:23 AM
Happy to announce our newest result on LDPC code based architectures 🧊
scirate.com/arxiv/2602.1...
scirate.com/arxiv/2602.1...
Happy to share our work with @anthony-leverrier.bsky.social, @christophe.vuillot.info, Jérémie Guillaud and Mazyar Mirrahimi on the LDPC-cat architecture was published in Nature Communications! Thanks to the reviewers for their useful feedback
www.nature.com/articles/s41...
www.nature.com/articles/s41...
LDPC-cat codes for low-overhead quantum computing in 2D - Nature Communications
Implementing full quantum error correction incurs a significant hardware overhead. Here, the authors propose a quantum computing architecture combining superconducting cat qubits with 2D local LDPC co...
www.nature.com
January 29, 2025 at 6:57 PM
Happy to share our work with @anthony-leverrier.bsky.social, @christophe.vuillot.info, Jérémie Guillaud and Mazyar Mirrahimi on the LDPC-cat architecture was published in Nature Communications! Thanks to the reviewers for their useful feedback
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Here are slides from our @qip2025.bsky.social talk on Logical gates on quantum LDPC codes by surgery / Universal Adapters. doi.org/10.5281/zenodo.14997472
March 10, 2025 at 4:56 AM
Here are slides from our @qip2025.bsky.social talk on Logical gates on quantum LDPC codes by surgery / Universal Adapters. doi.org/10.5281/zenodo.14997472
📢 New paper. 𝐐𝐆𝐏𝐔: 𝐏𝐚𝐫𝐚𝐥𝐥𝐞𝐥 𝐥𝐨𝐠𝐢𝐜 𝐢𝐧 𝐪𝐮𝐚𝐧𝐭𝐮𝐦 𝐋𝐃𝐏𝐂 𝐜𝐨𝐝𝐞𝐬. A great collaboration w/ Boren Gu, Andi Lui, Armanda Quintavalle, Xian Xu, & @jenseisert.bsky.social
𝐭𝐥𝐝𝐫; Quantum LDPC codes are an exciting architecture for fault-tolerant ... 1/n
scirate.com/arxiv/2603.0...
𝐭𝐥𝐝𝐫; 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
March 6, 2026 at 11:41 AM
📢 New paper. 𝐐𝐆𝐏𝐔: 𝐏𝐚𝐫𝐚𝐥𝐥𝐞𝐥 𝐥𝐨𝐠𝐢𝐜 𝐢𝐧 𝐪𝐮𝐚𝐧𝐭𝐮𝐦 𝐋𝐃𝐏𝐂 𝐜𝐨𝐝𝐞𝐬. A great collaboration w/ Boren Gu, Andi Lui, Armanda Quintavalle, Xian Xu, & @jenseisert.bsky.social
𝐭𝐥𝐝𝐫; Quantum LDPC codes are an exciting architecture for fault-tolerant ... 1/n
scirate.com/arxiv/2603.0...
𝐭𝐥𝐝𝐫; Quantum LDPC codes are an exciting architecture for fault-tolerant ... 1/n
scirate.com/arxiv/2603.0...
LDPC Logic gates started looking a lot more concrete -- explicit constructions with realistic overheads for near but interesting codes we know (BB, lifted product codes,..) coming soon.
November 5, 2025 at 4:47 AM
LDPC Logic gates started looking a lot more concrete -- explicit constructions with realistic overheads for near but interesting codes we know (BB, lifted product codes,..) coming soon.
happy to share this preprint from last week scirate.com/arxiv/2510.0... - my first with Iceberg!
big thanks to Larry and Nouedyn, who led this cool project ❄️
we have also written a short blogpost about it www.iceberg-quantum.com/blog/fast-su...
comments welcome 🧊
big thanks to Larry and Nouedyn, who led this cool project ❄️
we have also written a short blogpost about it www.iceberg-quantum.com/blog/fast-su...
comments welcome 🧊
Fast surgery for quantum LDPC codes
Quantum LDPC codes promise significant reductions in physical qubit overhead compared with topological codes. However, many existing constructions for performing logical operations come with distance-...
scirate.com
October 13, 2025 at 7:36 AM
happy to share this preprint from last week scirate.com/arxiv/2510.0... - my first with Iceberg!
big thanks to Larry and Nouedyn, who led this cool project ❄️
we have also written a short blogpost about it www.iceberg-quantum.com/blog/fast-su...
comments welcome 🧊
big thanks to Larry and Nouedyn, who led this cool project ❄️
we have also written a short blogpost about it www.iceberg-quantum.com/blog/fast-su...
comments welcome 🧊
Open position: we have an excited opening for a 3-year contract (including a very nice welcome package to start building a small team) in our group at Inria Paris. If you want to work on quantum LDPC codes and fault tolerance, please consider applying. (1/2)
May 6, 2025 at 11:11 AM
Open position: we have an excited opening for a 3-year contract (including a very nice welcome package to start building a small team) in our group at Inria Paris. If you want to work on quantum LDPC codes and fault tolerance, please consider applying. (1/2)
Time for some software.
If you’re an EE, you might be familiar with Shannon’s limit.
Modern encoders (LDPC) get *really* close to this mathematical bound.
Fun fact, your cellphone (on 5g) uses this encoding. 6x power reduction.
If you’re an EE, you might be familiar with Shannon’s limit.
Modern encoders (LDPC) get *really* close to this mathematical bound.
Fun fact, your cellphone (on 5g) uses this encoding. 6x power reduction.
September 26, 2025 at 7:01 PM
Time for some software.
If you’re an EE, you might be familiar with Shannon’s limit.
Modern encoders (LDPC) get *really* close to this mathematical bound.
Fun fact, your cellphone (on 5g) uses this encoding. 6x power reduction.
If you’re an EE, you might be familiar with Shannon’s limit.
Modern encoders (LDPC) get *really* close to this mathematical bound.
Fun fact, your cellphone (on 5g) uses this encoding. 6x power reduction.
Great work by Yiyi Cai that improved the analysis of robustness for the local codes used in quantum Tanner codes.
(To be fair, the bounds remain quite pessimistic if one wishes good quantum LDPC codes with linear distance.)
thesis.library.caltech.edu/17412/
(To be fair, the bounds remain quite pessimistic if one wishes good quantum LDPC codes with linear distance.)
thesis.library.caltech.edu/17412/
June 11, 2025 at 11:43 AM
Great work by Yiyi Cai that improved the analysis of robustness for the local codes used in quantum Tanner codes.
(To be fair, the bounds remain quite pessimistic if one wishes good quantum LDPC codes with linear distance.)
thesis.library.caltech.edu/17412/
(To be fair, the bounds remain quite pessimistic if one wishes good quantum LDPC codes with linear distance.)
thesis.library.caltech.edu/17412/
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
they've become quite fashionable again in quantum computing as they're useful to design good quantum LDPC codes.
April 25, 2025 at 8:18 PM
they've become quite fashionable again in quantum computing as they're useful to design good quantum LDPC codes.
Today #quantum arXiv selection: Quantum reinforcement learning to play Atari games, excited-state calculations with quantum neural networks, Clifford perturbation approximation, improved erasure decoding of quantum LDPC codes, Pauli measurement for quantum dynamics.
More details and links below:
More details and links below:
December 13, 2024 at 6:28 PM
Today #quantum arXiv selection: Quantum reinforcement learning to play Atari games, excited-state calculations with quantum neural networks, Clifford perturbation approximation, improved erasure decoding of quantum LDPC codes, Pauli measurement for quantum dynamics.
More details and links below:
More details and links below:
It's been an amazing week at QEC25 seeing the incredible work people have done in the field over the past couple of years!
Abe Jacob did a fantastic job presenting our new work on trivariate tricycle codes, quantum LDPC codes that combine several nice fault-tolerant properties.
Abe Jacob did a fantastic job presenting our new work on trivariate tricycle codes, quantum LDPC codes that combine several nice fault-tolerant properties.
August 16, 2025 at 2:46 PM
It's been an amazing week at QEC25 seeing the incredible work people have done in the field over the past couple of years!
Abe Jacob did a fantastic job presenting our new work on trivariate tricycle codes, quantum LDPC codes that combine several nice fault-tolerant properties.
Abe Jacob did a fantastic job presenting our new work on trivariate tricycle codes, quantum LDPC codes that combine several nice fault-tolerant properties.
I have added support to generate alists for the 5G LDPC codes to my ldpc-toolbox. I use this and a simple sum-product algorithm implementation to decode the PDSCH. I show how the LLRs evolve during the decoding iterations and how all the punctured bits get recovered.
June 13, 2025 at 7:59 AM
I have added support to generate alists for the 5G LDPC codes to my ldpc-toolbox. I use this and a simple sum-product algorithm implementation to decode the PDSCH. I show how the LLRs evolve during the decoding iterations and how all the punctured bits get recovered.
Adaptive decoder uses internal disagreement between belief propagation and ordered-statistics outputs to identify hard decoding instances, reducing classical costs 3.6× while recovering 85-92% of accuracy gains on quantum LDPC codes.
#QuantumErrorCorrection #QuantumComputing #LDPCCodes
#QuantumErrorCorrection #QuantumComputing #LDPCCodes
Adaptive Decoding of Quantum LDPC Codes Through Decoder Disagreement
arxiv.org
September 30, 2026 at 6:27 PM
Adaptive decoder uses internal disagreement between belief propagation and ordered-statistics outputs to identify hard decoding instances, reducing classical costs 3.6× while recovering 85-92% of accuracy gains on quantum LDPC codes.
#QuantumErrorCorrection #QuantumComputing #LDPCCodes
#QuantumErrorCorrection #QuantumComputing #LDPCCodes
🎀SCHEDULE TIME🎀
🎀 Highlights 🎀
- Large LDPC & REPO collab!
- Friendsgiving art time! Drawing fwends
- FIVE NIGHTS AT FREDDYS!!!
#speckschedule #vtuberuprising #vtuber
Art by @/elisaskart
🎀 Highlights 🎀
- Large LDPC & REPO collab!
- Friendsgiving art time! Drawing fwends
- FIVE NIGHTS AT FREDDYS!!!
#speckschedule #vtuberuprising #vtuber
Art by @/elisaskart
November 24, 2025 at 4:24 AM
🎀SCHEDULE TIME🎀
🎀 Highlights 🎀
- Large LDPC & REPO collab!
- Friendsgiving art time! Drawing fwends
- FIVE NIGHTS AT FREDDYS!!!
#speckschedule #vtuberuprising #vtuber
Art by @/elisaskart
🎀 Highlights 🎀
- Large LDPC & REPO collab!
- Friendsgiving art time! Drawing fwends
- FIVE NIGHTS AT FREDDYS!!!
#speckschedule #vtuberuprising #vtuber
Art by @/elisaskart
🔴STREAM SCHEDULE🔴
June 2 - 8
Lots of Collabs this week!!
Highlights
- GGD w/ @hounddoggamez.bsky.social
- LDPC w/ friends!!
- Raft w/ @felfoxling.bsky.social & @cyberkaida.bsky.social
- ARTARTARTART
Action packed week with lots of fun!! Stay tuned :>
#speckschedule #livestreaming #vtuberuprising
June 2 - 8
Lots of Collabs this week!!
Highlights
- GGD w/ @hounddoggamez.bsky.social
- LDPC w/ friends!!
- Raft w/ @felfoxling.bsky.social & @cyberkaida.bsky.social
- ARTARTARTART
Action packed week with lots of fun!! Stay tuned :>
#speckschedule #livestreaming #vtuberuprising
June 2, 2025 at 10:41 PM
🔴STREAM SCHEDULE🔴
June 2 - 8
Lots of Collabs this week!!
Highlights
- GGD w/ @hounddoggamez.bsky.social
- LDPC w/ friends!!
- Raft w/ @felfoxling.bsky.social & @cyberkaida.bsky.social
- ARTARTARTART
Action packed week with lots of fun!! Stay tuned :>
#speckschedule #livestreaming #vtuberuprising
June 2 - 8
Lots of Collabs this week!!
Highlights
- GGD w/ @hounddoggamez.bsky.social
- LDPC w/ friends!!
- Raft w/ @felfoxling.bsky.social & @cyberkaida.bsky.social
- ARTARTARTART
Action packed week with lots of fun!! Stay tuned :>
#speckschedule #livestreaming #vtuberuprising
Jianshen Zhu: Limits of Weight-Bounded Redundant Checks for Peeling Decoding of Random Regular LDPC Codes https://arxiv.org/abs/2610.05260 https://arxiv.org/pdf/2610.05260 https://arxiv.org/html/2610.05260
October 6, 2026 at 6:42 AM
Jianshen Zhu: Limits of Weight-Bounded Redundant Checks for Peeling Decoding of Random Regular LDPC Codes https://arxiv.org/abs/2610.05260 https://arxiv.org/pdf/2610.05260 https://arxiv.org/html/2610.05260
QGPU: Parallel logic in quantum LDPC codes
scirate.com/arxiv/2603.0...
We introduce #clusteredcycliccodes for #quantumerrorcorrection and show how to pursue highly parallelized surface-code style quantum logic with quantum low density parity check codes featuring simple logicals.
scirate.com/arxiv/2603.0...
We introduce #clusteredcycliccodes for #quantumerrorcorrection and show how to pursue highly parallelized surface-code style quantum logic with quantum low density parity check codes featuring simple logicals.
March 6, 2026 at 5:46 AM
QGPU: Parallel logic in quantum LDPC codes
scirate.com/arxiv/2603.0...
We introduce #clusteredcycliccodes for #quantumerrorcorrection and show how to pursue highly parallelized surface-code style quantum logic with quantum low density parity check codes featuring simple logicals.
scirate.com/arxiv/2603.0...
We introduce #clusteredcycliccodes for #quantumerrorcorrection and show how to pursue highly parallelized surface-code style quantum logic with quantum low density parity check codes featuring simple logicals.
Today in QEC on the arXiv: a new quantum version of a known decoder for classical LDPC codes
arxiv.org/abs/2310.07868
Specifically, it converts errors into erasures for hypergraph product codes
arxiv.org/abs/2310.07868
Specifically, it converts errors into erasures for hypergraph product codes
October 13, 2023 at 5:38 AM
Today in QEC on the arXiv: a new quantum version of a known decoder for classical LDPC codes
arxiv.org/abs/2310.07868
Specifically, it converts errors into erasures for hypergraph product codes
arxiv.org/abs/2310.07868
Specifically, it converts errors into erasures for hypergraph product codes
Learned Parallel Bit-Flipping Sequential Belief Propagation Decoding of Quantum LDPC Codes
https://arxiv.org/pdf/2610.01068
Mohsen Moradi, Taejoon Kim, Remi A. Chou.
https://arxiv.org/pdf/2610.01068
Mohsen Moradi, Taejoon Kim, Remi A. Chou.
https://arxiv.org/abs/2610.01068
arXiv abstract link
arxiv.org
October 6, 2026 at 12:35 PM
Learned Parallel Bit-Flipping Sequential Belief Propagation Decoding of Quantum LDPC Codes
https://arxiv.org/pdf/2610.01068
Mohsen Moradi, Taejoon Kim, Remi A. Chou.
https://arxiv.org/pdf/2610.01068
Mohsen Moradi, Taejoon Kim, Remi A. Chou.