new paper!
how can one predict and detect magic of many-body quantum states using few body measurements ? what are the fundamental complexity-theoretic limitations ?
we tackle this question in arxiv.org/abs/2602.18939 1/n
Sometimes, two rounds of revision is simply not enough.
Especially for works that have extremely complicated technical contributions, or particularly subtle conceptual proposals, it would be better to have more rounds.
That's super interesting! I wonder what new things will come out of formalizing quantum information theorems.
I've recently joined my first ever presential Chess tournment. I'm pretty happy that even without playing for about 8 or 9 months (and without studying either) I've ended up with 3.5/7.
Let's see how I'll perform for future ones.
I am extremely excited to share our latest news: LANL formed a Center for Quantum Computing!!
This Center will enhance our quantum workforce via co-location, and will even host the Summer School! So, if you applied for it, you might be the first cohort in the Center!
www.lanl.gov/media/news/0...
Always nice to see that quantum foundations have survived the wave of capitalism that has swept through quantum.
Today Hausmann and Renner from ETH show that quantum states are more than just a few probability distributions in a trenchcoat.
arxiv.org/abs/2601.18872
I wonder if, internally, the organizers of the annual conferences of Quantum Information in Spain [Informacion Cuantica en Espana] have conceived changing the acronym of the conference due to recent events.
indico.ific.uv.es/event/7934/
We also show other neat results (e.g. higher order real-valued invariants of multi-states featuring set imaginarity)
Thanks to professors Mao-Sheng Li and Lin Zhang for this collaboration! Hopefully the first of many :)
#QuantumInformation #QuantumResources #Coherence #BargmannInvariant
The only extra information needed is the sign of its imaginary part, which is a truly higher-order information that is not present in two-state overlaps alone.
The information of this sign is the single relational information that requires higher-order invariants.
A major technical results we present is the following:
For qubits, every complex-valued multivariate trace of states (aka Bargmann invariant), like Tr(Ο1Ο2Ο3Ο4), is almost entirely determined by simple two-state overlaps.
One of the main results is beautifully geometric and extremely natural.
For a set of qubit states (think points on the Bloch sphere):
1) The set is incoherent if all their Bloch vectors lie on a single line.
2) The set is imaginarity-free if all vectors lie in a single plane
Fresh from the press! ππ
journals.aps.org/pra/abstract...
We advance the study of basis-independent formulations of quantum resources that are based on multi-states (equivalently sets of states, or yet classical-quantum channels).
Always a good talk
Thanks! :)
I'm happy to join PRA's editorial team as an Early Career Board Member!
The journal has been a (if not *the most*) crucially important scientific source for quantum information, foundations, and computation.
It's a huge honour!
@apsphysics.bsky.social #PRA #Quantum
Dominik Hangleiter weighs in with an informative post about a much debated question: Has quantum advantage been achieved? This is the first post in a three-part series.
quantumfrontiers.com/2026/01/06/h...
A dream job opportunity! Our team is hiring a Senior Research Scientist in Quantum Error Mitigation Theory on the Quantum AI team, and we get to be colleagues.
www.google.com/about/caree...
Why are academic societies still on X it must violate all their code of conducts?
The Institute of Physics (@iop.org), its publishing arm @ioppublishing.bsky.social, and its flagship magazine @physicsworld.bsky.social (which I work for) figured this out a long time ago. If youβre a physicist/astronomer/science teacher/something else relevant, follow them & show them some love!
New paper published in @physreva.bsky.social, jointly with Kyrylo Simonov (Vienna) and Rafael Wagner (INL/Minho/Ulm)! We simplify the estimation of multivariate traces/Bargmann invariants using partial classical info. Thanks @quantumrw.bsky.social and Kyrylo! journals.aps.org/pra/abstract...
Deeply honoured to have been named one of the Quantum 100 for the UN'S International Year of Quantum Science and Technology (IYQ)! quantum2025.org/quantum-100/...
Thrilled to share that I have been awarded the very prestigious Alexander von Humboldt Postdoctoral Fellowship! :) #HumboldtFellowship
The @ccbpp.bsky.social Spring School on near-term quantum computing is back! If you are a young (PhD/MSc) researcher in quantum science and want to get exposed to the recent developments on quantum computing, do not hesitate coming to Benasque on March 15 - 21 next year!
www.benasque.org/2026ntqc/
I have also received one (particularly bad and generic) from a PRA report. It is becoming increasingly common I think
We recently received a referee report from Phys. Rev. Lett. @apsphysics.bsky.social that was obviously written by generative AI. It is so bizarre to read it; I have never received anything like it before. What measures is @apsphysics.bsky.social taking to ensure the integrity of the review process?
Peter Shor: we haven't found many new quantum algorithms, in part, because we need larger quantum devices for testing our heuristics. He gives several examples of algorithms that were discovered computationally, including turbo codes, @fermilab.bsky.social quantum symposium by the SQMS center.
Newly published in Quantum: Consistent circuits for indefinite causal order by Augustin Vanrietvelde, Nick Ormrod, HlΓ©r KristjΓ‘nsson, and Jonathan Barrett doi.org/10.22331/q-2...
Probably -- as far as I know -- the first contextuality-based quantum information advantage from the Google Quantum AI team.
scirate.com/arxiv/2512.0...
Comments are very welcome!
Although itβs not really possible to revise a PhD thesis after submission, Iβm always glad to receive thoughtful feedback.
At least, (critical) comments will help me improve how I present the topic in future work.
