Alexander Cowtan

[Alexander Cowtan @AlexanderCowtan]

@letonyo I suspect the same is also true for computing with qLDPC codes. The main problem with spacetime codes is that it is very hard to explore a very large search space of possible entanglement + measurement sequences.

[Alexander Cowtan @AlexanderCowtan]

New paper up on arxiv: https://t.co/lg8vqEComd

[Find me on bsky @colin-fraser.net @colin_fraser]

It’s not obvious what exactly you’re supposed to do with a machine that can perform any task you can imagine with at best 70% accuracy

[Alexander Cowtan @AlexanderCowtan]

Two more nice papers came out yesterday on logical measurements with stabiliser codes (although the first can in principle be generalised further): https://t.co/eRAAjh0n44, https://t.co/7AZUtH89yI. Very impressive how low the overhead for single logical qubit measurements is now.

[Aleks Kissinger @AleksKissinger]

Picturing Quantum Software is a brand new book covering state of the art methods in quantum compiling, circuit optimisation, classical simulation, and fault-tolerant quantum computing using the language of the ZX-calculus. Get the preprint for free: https://t.co/v1NouwVOoE

[Fault-Tolerant Quantum Technologies in Benasque @FTQTBenasque]

Tomorrow we'll have
🗣️ @kenbrownquantum at 10:00⌚
🗣️ @AlexanderCowtan at 11:30⌚
👥 experimental panel discussion at 15:30⌚
🗣️ @ZhuGuanyu at 16:45⌚

[Alexander Cowtan @AlexanderCowtan]

I forgot to post about it, but I recently put out a paper with open-source software for performing surgeries with qLDPC codes: https://t.co/gdJeSUmAiQ. Happily, there are two beautiful papers from today on a similar subject: https://t.co/Gs1M1nKI8E, https://t.co/WFOaIpnVbN.

[Alexander Cowtan @AlexanderCowtan]

@DulwichQuantum Hm, the explanation in the video of how quantum computers can break encryption at 36:45 is just wrong, sadly.

[Alexander Cowtan @AlexanderCowtan]

There is a follow-up coming soon, where I apply the formalism to near-term qLDPC codes. This will come with open-source software to automate such surgeries.

[Alexander Cowtan @AlexanderCowtan]

Happy to announce that my paper with @fridaysimon has been published: https://t.co/ZNqsk5Urc5

Thanks to the anonymous reviewers and @CVuillot, whose feedback was invaluable.

[Alexander Cowtan @AlexanderCowtan]

@HaussernotC Rb4

[Alexander Cowtan @AlexanderCowtan]

My Masters student from last year, Samo, has put his thesis on arxiv: https://t.co/gyfeq1cwzR. It's a very patient and thorough ground-up description of qudit CSS codes. It also has a nice result on the logical spaces, which we believe to be novel (in quantum info anyway).

[Alexander Cowtan @AlexanderCowtan]

@ChessifyMe Qc7

[Alexander Cowtan @AlexanderCowtan]

@ImShahinyan Kh2

[Alexander Cowtan @AlexanderCowtan]

@ImShahinyan Nd6

[Alexander Cowtan @AlexanderCowtan]

@HaussernotC Qf3

[Alexander Cowtan @AlexanderCowtan]

@JohanSalomon Qd7

[Alexander Cowtan @AlexanderCowtan]

@ImShahinyan c8N

[Alexander Cowtan @AlexanderCowtan]

@ImShahinyan Bh8

[Alexander Cowtan @AlexanderCowtan]

@ImShahinyan Re2