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Timo Hillmann

@timohillmann.bsky.social
504 followers 173 following 43 posts

PhD student @ Chalmers University of Technology

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Reposted by Timo Hillmann
Lucas Berent @lucasberent.bsky.social · 13/10/2025
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 🧊
scirate.com
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-...
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Timo Hillmann @timohillmann.bsky.social · 03/09/2025
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...
nature.com
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....
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Reposted by Timo Hillmann
Arne Semsrott @arnesemsrott.bsky.social · 01/07/2025
Der Polizist behält seinen Job, denn: "Aus den Nachrichten ergebe sich noch keine eindeutig verfassungsfeindliche Gesinnung."
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Timo Hillmann @timohillmann.bsky.social · 03/06/2025
Great work by the IBM Quantum team on Relay-BP, a BP-only heuristic decoder for general qLDPC codes. From a first look, the performance seems strong and further supports qLDPC architectures from a decoding-focused perspective. arxiv.org/abs/2506.01779
arxiv.org
Improved belief propagation is sufficient for real-time decoding of quantum memory
We introduce a new heuristic decoder, Relay-BP, targeting real-time quantum circuit decoding for large-scale quantum computers. Relay-BP achieves high accuracy across circuit-noise decoding problems: ...
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Reposted by Timo Hillmann
Seok-Hyung Lee @seokhyung-lee.bsky.social · 16/05/2025
I recently created a simple Python wrapper for the Tesseract decoder for personal use, but I’ve decided to make it public in case others find it useful. Feel free to let me know if you encounter any issues! github.com/seokhyung-le...
github.com
GitHub - seokhyung-lee/tesseract-python: Python Wrapper for Tesseract Decoder
Python Wrapper for Tesseract Decoder. Contribute to seokhyung-lee/tesseract-python development by creating an account on GitHub.
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Reposted by Timo Hillmann
Henrik Wilming @arrr.de · 14/05/2025
There is now an official announcement: The TIB has archived the current status of the arXiv: blog.tib.eu/2025/05/14/p...
blog.tib.eu
Protecting Science: TIB builds Dark Archive for arXiv - TIB-Blog
Research and science are international; it is not for nothing that we speak of international specialist communities. Although a service such as arXiv is operated by an institution based in the USA, na...
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Reposted by Timo Hillmann
Laura Lopez @ohdearz.bsky.social · 03/05/2025
New AIP report discusses impact of funding cuts in physics & astro depts: “No one can be productive in a climate like this—it is the end of the US scientific and technical dominance in the world—we will not recover from this in a decade...”. ⚛️🔭 physics.aps.org/articles/v18...
Excerpt from APS article on the new AIP report on impact of funding cuts in physics & astro departments: "One cannot work like this - all energy goes in thinking how to survive and not in physics - it is like being in the war," another department chair wrote. "No one can be productive in a climate like this - it is the end of the US scientific and technical dominance in the world - we will not recover from this in a decade," they added.
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Reposted by Timo Hillmann
Max Czollek @maxczollek.bsky.social · 02/05/2025
Ok, heute ARD-Brennpunkt zur AfD, auf einen der Gäste kommt ihr nie. Richtig, Tino Chrupalla. Vor 80 Jahren hätte der zumindest auf der Anklagebank gesessen. Woher diese unbändige Lust, weiter mit Nazis zu reden? Ist es Masochismus? Erinnerungskultur tm? Oder vermisst ihr einfach eure Omas und Opas?
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qctip2025.bsky.social @qctip2025.bsky.social · 23/04/2025
Next up in session A is Lucas Berent telling us about LSD, a popular topic in Berlin.
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Mark M. Wilde @markwilde.bsky.social · 12/04/2025
This past week, I received a second stop work order on one of my grants. This now means that we can no longer spend on *two* of my major grants. Several of my group members will now graduate earlier than expected, I am looking into being a consultant for the summer, and students will do internships
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Ingwar Perowanowitsch @ingwarpero.bsky.social · 10/04/2025
Dass ausgerechnet die CSU-Politikerin Doro Bär, die noch vor wenigen Jahren den menschengemachten Klimawandel leugnete, jetzt neue Forschungsministerin werden soll - ein Job, bei dem es ganz besonders darauf ankommt, der Kraft der Wissenschaft zu vertrauen, ist m.E. hochproblematisch.
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Timo Hillmann @timohillmann.bsky.social · 14/03/2025
Typing away on my PhD thesis - no matter where I go next, the views from my office will be hard to beat, unfortunately.
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Timo Hillmann @timohillmann.bsky.social · 13/03/2025
When we wrote the theory proposal for the dissipatively stabilized squeezed cat qubit, we got into an argument with the copy editors of the journal. I had a strong opinion against calling it „cat state qubit“ (as no one does) which got so far that we almost had to add a disclaimer, see the mail
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Reposted by Timo Hillmann
Henrik Wilming @arrr.de · 15/02/2025
I think it would be a good time to reinstantiate the mirror network for the # arXiv. It’s an essential piece of the global research community in math, physics, computer-science and adjacent fields. Under the current circumstances it should not only be hosted in the US. #quantum #math #physics #cs
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Diego Ruiz @diego-ruiz.bsky.social · 14/02/2025
First realization of a dissipatively stabilized squeezed cat qubit (a slight variation that we called a moon cat 🌛 actually), it was super interesting to work on this with experimentalists! arxiv.org/abs/2502.07892 My two key takeaways ⬇️⬇️
arxiv.org
Enhancing dissipative cat qubit protection by squeezing
Dissipative cat-qubits are a promising architecture for quantum processors due to their built-in quantum error correction. By leveraging two-photon stabilization, they achieve an exponentially suppres...
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Timo Hillmann @timohillmann.bsky.social · 13/02/2025
I’m super excited to see the experimental realization of a variant of the dissipatively stabilized squeezed cat that we proposed! Congrats to Alice & Bob and everyone else involved Especially great to see that it comes with similar performance gains as promised by the theory arxiv.org/abs/2502.07892
arxiv.org
Enhancing dissipative cat qubit protection by squeezing
Dissipative cat-qubits are a promising architecture for quantum processors due to their built-in quantum error correction. By leveraging two-photon stabilization, they achieve an exponentially suppres...
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Timo Hillmann @timohillmann.bsky.social · 11/02/2025
@adamwills1.bsky.social updates is on his recent work with collaborators on constant overhead magic state distillation and quantum codes with addressable and transversal non-Clifford gates #Coogee25
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Timo Hillmann @timohillmann.bsky.social · 11/02/2025
Armanda Quintavalle giving a great introduction to Quantum Tanner codes and talking about on going work of finding small~ish examples with good properties. #Coogee25
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Timo Hillmann @timohillmann.bsky.social · 10/02/2025
@mattmcewen.bsky.social kicking of #Coogee25.
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Reposted by Timo Hillmann
Werner Dobrautz @dobrautz.bsky.social · 14/01/2025
PhD/PostDoc in Quantum Computing for Quantum Chemistry Have a look if you want to develop novel quantum computing approaches to enable accurate electronic structure calculations: dobrautz.github.io/jobs/ Sharing and endorsing would be greatly appreciated <3 #chemsky #quantsky #quantum #chemjobs
dobrautz.github.io
Jobs | Werner Dobrautz
Open positions in our group
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