Zoltán Zimborás
@zoltanzimboras.bsky.social
Wigner's friend. Coincidentally also the Head of the Quantum Computing Group at Wigner RCP. Occasionally hired for the indirect observation of measurements.
This week scalable quantum generative learning finally reached bosonic systems: scirate.com/arxiv/2603.1... 1/3
Great thread by Stefan Knecht on the new paper by the Garnet Chan group: "FeMoCo hasn’t been entirely solved, but for its gold-standard active space model (which is the model QC folks have been looking at!), there is now a classical benchmark that provides an excellent baseline for any quantum work"
Stefan Knecht@kinnhaenger.bsky.social · 7mo agoMy recommendation: read the paper, an excellent work marking IMHO another milestone for quantum chemistry, congratulations to all authors. To add to the cited post, the most important conclusions of the work are highlighted in the picture, a breakdown will be provided in the comments.
A larger update of our Majorana propagation paper is out! arxiv.org/abs/2503.18939
Zoe Holmes@qzoeholmes.bsky.social · 9mo agoHey we've just updated the arXiv version of our Majorana propagation paper We now have end-to-end efficiency guarantees for a randomized model of an adaptVQE-like circuit (Our error bounds here are way tighter than the ones for pauli prop and also use a new Markov chain based proof strategy)
Happy to see that our paper on the classical training and quantum inference of Fermionic Born Machines is now out on arXiv! 1/6 scirate.com/arxiv/2511.1...
Super happy to see that our paper on the "Quantum generalizations of Glauber and Metropolis dynamics" with Anthony Chen, Csaba Czabán, João Doriguello, András Gilyén, Balázs Kabella, Michael Kastoryano, József Mák was accepted as a talk at #QIP2026 🎉🎉🎉
Thanks a lot for visiting, Alex (@physicistalex.bsky.social)! It was super nice and productive - we found a couple of nice platonic ideas concerning hyperbolic tilings and spin models.
Alexander Jahn@physicistalex.bsky.social · last yr.Back from an exciting week visiting the great @zoltanzimboras.bsky.social in Budapest! As you can see, I was also very busy pensively staring at Platonic solids at the Hungarian National Museum.
The paper was a result of a wonderful collaboration with Lorenzo Grevink, @haferjonas.bsky.social , @markusheinrich.bsky.social, Jonas Helsen, Marcel Hinsche, Tommy Schuster that started during a discussion at the Random Quantum Circuits in Amsterdam.
Zoltán Zimborás@zoltanzimboras.bsky.social · last yr.In our new paper, we derive linear lower bounds on the circuit depth of Clifford, orthogonal, symplectic, matchgate designs (built of local gates from the respective groups).
In our new paper, we derive linear lower bounds on the circuit depth of Clifford, orthogonal, symplectic, matchgate designs (built of local gates from the respective groups).
Markus Heinrich@markusheinrich.bsky.social · last yr.Some statistical features of Haar unitaries can be well approximated in log depth, exponentially faster than previously thought. We give evidence that this is a 'truly quantum' effect by deriving linear lower bounds for orthogonal, Clifford, symplectic, matchgate groups scirate.com/arxiv/2506.2...
This is not the way for HTML papers to gain visibility, but it's a kind of fallback I suppose. Last day's PDFs should be gradually coming back online, apologies for the delay.
Zoltán Zimborás@zoltanzimboras.bsky.social · last yr.ArXiv seems broken this morning, can't get the pdf of today's papers. (Btw, the html option still works, so one can access the papers in that form.) @arxiv-quant-ph.bsky.social
ArXiv seems broken this morning, can't get the pdf of today's papers. (Btw, the html option still works, so one can access the papers in that form.) @arxiv-quant-ph.bsky.social
Our new Majorana Propagation method is out! It can be used either alone as a classical simulation method or in conjunction with quantum subroutines, see @qzoeholmes.bsky.social's thread below. (Btw, it's so efficient that it broke scirate: this and all papers after ours are missing from scirate.)
Zoe Holmes@qzoeholmes.bsky.social · last yr.Hey! On the arXiv today we present `Majorana Propagation’ a new classical algorithm for simulating Fermionic circuits. Depending on your mood... the algorithm can be viewed either as naturally suited to compete with, or collaboratively enhance, quantum hardware simulations.
Happy to share that I will join University of Helsinki as a Professor at the Department of Physics. The team at UH has been incredibly welcoming, and I’m looking forward to working here. More to come soon (e.g., announcements of open postdoc, PhD positions)!
Recently, I was rereading Carl Sagan’s book, "The Demon-Haunted World: Science as a Candle in the Dark" published in 1995. I am just now randomly posting a paragraph from it; you know, any resemblance to actual events is purely coincidental.
I am super happy that this work is out now in Nature Communications! It was really fun to work and discuss with Charles ChunJun Cao, Wissam Chemissany and Alexander Jahn! www.nature.com/articles/s41...
Overlapping qubits from non-isometric maps and de Sitter tensor networks - Nature Communications
For some states in quantum gravity, notions of locality can deviate from effective field theory predictions. Here, the authors show that such deviations can be recast in the quantum information framew...
nature.com
"We do not yet have proven exponential quantum speedups for end-to-end applications in machine learning, optimization, quantum chemistry, or materials science that guarantee substantial commercial and financial value." arxiv.org/pdf/2501.05694
Useful perspective, clearly written and well-reasoned. arxiv.org/abs/2501.05694
Myths around quantum computation before full fault tolerance: What no-go theorems rule out and what they don't
In this perspective article, we revisit and critically evaluate prevailing viewpoints on the capabilities and limitations of near-term quantum computing and its potential transition toward fully fault...
arxiv.org
To reach some consensus about the prospects of near-term (late nisq and early fault tolerant) quantum computing, we had a 3-day discussion event (“Quantum Now”) in Lapland with both optimists and pessimists. This continued at SeeQA 2024 in Oxford. See our conclusions here arxiv.org/abs/2501.05694
Myths around quantum computation before full fault tolerance: What no-go theorems rule out and what they don't
In this perspective article, we revisit and critically evaluate prevailing viewpoints on the capabilities and limitations of near-term quantum computing and its potential transition toward fully fault...
arxiv.org