A larger update of our Majorana propagation paper is out! arxiv.org/abs/2503.18939

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.

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.

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).

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.

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.)

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)!

Wow! Wonder how what Google map shows in Mexico....

That was fast! Today on my Google Map:

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...

"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

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