Rafael Wagner
@quantumrw.bsky.social
📤 1198
📥 2363
📝 309
PhD Student in quantum foundations and quantum information
pinned post!
New paper out in
#PRX_Quantum
! 📃📃 We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation
#Contextuality
#Nonclassicality
#QuantumThermodynamics
journals.aps.org/prxquantum/a...
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Contextuality in Anomalous Heat Flow
For a class of quantum systems that exhibit contextuality, a rigorous theoretical connection between anomalous heat flow and quantumness is established, thereby opening avenues to explore nonclassical...
https://journals.aps.org/prxquantum/abstract/10.1103/f68k-cjx4
8 months ago
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John Preskill
10 days ago
From dream to reality: The bridge connecting quantum information and matter to high energy physics
@caltech.edu
now exists.
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First cube solved!
29 days ago
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To me, one of the most compelling aspects of future quantum computers is that they will be experimental platforms for physicists everywhere. This new manuscript from my former supervisor is a neat implementation of this, where they implement an interaction-free test.
arxiv.org/abs/2604.04691
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https://arxiv.org/pdf/2604.04691
about 1 month ago
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Amara Graps
about 2 months ago
🥳 It was an awesome mtg, where my 🪖 Def and ⚛️ Quantum interests merged. The 1️⃣st Quantum Security Defence World Symposium! 🗝️ 🌏 🚀 Anna: “It began as a Community!
is.gd/ljgR0i
#QSECDEF2026Paris
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1st Quantum Security Defence World Symposium! 💚💃 Thank you so much to everyone that took a chance on our first event and joined as speakers and participants! You all made it a roaring success 💥🚀 | A...
1st Quantum Security Defence World Symposium! 💚💃 Thank you so much to everyone that took a chance on our first event and joined as speakers and participants! You all made it a roaring success 💥🚀
https://is.gd/ljgR0i
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Dulwich Quantum Computing
about 2 months ago
Get ready for a "TRANSPARENT tactical battlefield" thanks to quantum security! Report by
@amaragraps.bsky.social
from the 1st Quantum Security Defence World Symposium.
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Is LinkedIn the next quantum realm?
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about 1 month ago
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Marco Cerezo
about 1 month ago
Extremely proud to see our paper "Quantum Convolutional Neural Networks are Effectively Classically Simulable" published in PRX Quantum
journals.aps.org/prxquantum/a...
This is an instantiation of our work, provable absence of barren plateaus implies classical simulability.
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https://journals.aps.org/prxquantum/abs…
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Victor V. Albert
about 2 months ago
Google Quantum AI now a two-platform company.
blog.google/innovation-a...
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Building superconducting and neutral atom quantum computers
An overview of Google Quantum AI’s work on superconducting and neutral atom quantum computers.
https://blog.google/innovation-and-ai/technology/research/neutral-atom-quantum-computers/
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Zlatko Minev
about 2 months ago
Big news of the day, at Google we are building both superconducting and neutral atom quantum computers.
blog.google/innovation-...
#quantum
#atom
#google
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Building superconducting and neutral atom quantum computers
An overview of Google Quantum AI’s work on superconducting and neutral atom quantum computers.
https://blog.google/innovation-and-ai/technology/research/neutral-atom-quantum-computers/
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Interesting to include ''complexity'' as a major frontier of physics.
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about 2 months ago
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Johannes Jakob Meyer
about 2 months ago
Such a well-deserved honor! Taking Gilles Brassard's quantum info course at UdeM is what got me into the field. It is still the best course I ever attended.
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John Preskill
about 2 months ago
I'm thrilled that Charlie Bennett and Gilles Brassard have received the A. M. Turing Award for “their essential role in establishing the foundations of quantum information science and transforming secure communication and computing.” Congratulations!
www.quantamagazine.org/quantum-cryp...
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Quantum Cryptography Pioneers Win Turing Award | Quanta Magazine
Charles Bennett and Gilles Brassard were recognized for their foundational work in quantum information science.
https://www.quantamagazine.org/quantum-cryptography-pioneers-win-turing-award-20260318/
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Association for Computing Machinery
about 2 months ago
Congratulations to Charles H. Bennett and Gilles Brassard on receiving the 2025 ACM A.M. Turing Award! They are recognized for their essential role in establishing the foundations of quantum information science and transforming secure communication and computing.
awards.acm.org/turing
@umontreal
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[Portuguese post!] Vitória importante para os acadêmicos! Bolsistas agora vao ter acesso à seguridade social. É uma vitória da ciência!!!
about 2 months ago
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Rafael Macêdo
2 months ago
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
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Predicting Magic from Very Few Measurements
The nonstabilizerness of quantum states is a necessary resource for universal quantum computation, yet its characterization is notoriously demanding. Quantifying nonstabilizerness typically requires a...
https://arxiv.org/abs/2602.18939
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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.
3 months ago
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That's super interesting! I wonder what new things will come out of formalizing quantum information theorems.
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3 months ago
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Dulwich Quantum Computing
3 months ago
Are you ready for quantum vibes?!
arthurmerlean.com
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MerLean
An Agentic Framework for Autoformalization in Quantum Computation
https://arthurmerlean.com/
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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.
3 months ago
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Marco Cerezo
3 months ago
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...
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Los Alamos forms quantum computing-focused research center | LANL
Los Alamos National Lab forms quantum computing center, consolidating diverse research to drive innovation in national security, algorithms, and workforce development.
https://www.lanl.gov/media/news/0203-quantum-computing-focused-research-center?utm_source=twitter&utm_medium=social&utm_term=8c491e6d-0aaa-47b0-b0e0-b0aa088f6d4d&utm_content=article&utm_campaign=losalamosnatlab
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James Wootton
3 months ago
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
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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/
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ICE-10: Quantum Information in Spain (20-24 October 2025) · IFIC Indico Server (Indico)
ICE-10 is the 10th edition of the conference Quantum Information in Spain [Información Cuántica en España (ICE)]. ICE is the annual meeting of the Spanish Network on Quantum Information (RITCE) which brings together national and international researchers working on quantum computing, quantum communications, quantum metrology, quantum thermodynamics, and other areas of quantum science and technologies. In particular, the meeting aims to provide a platform to increase the visibility of...
https://indico.ific.uv.es/event/7934/
3 months ago
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Fresh from the press! 📃🎆
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).
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Multistate imaginarity and coherence in qubit systems
Traditionally, the characterization of quantum resources has focused on individual quantum states. Recent literature, however, has increasingly explored the characterization of resources in multistate...
https://journals.aps.org/pra/abstract/10.1103/tpgw-v6ht
4 months ago
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Always a good talk
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4 months ago
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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
4 months ago
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John Preskill
4 months ago
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...
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Has quantum advantage been achieved?
Recently, I gave a couple of perspective talks on quantum advantage, one at the annual retreat of the CIQC and one at a recent KITP programme. I started off by polling the audience on who believed …
https://quantumfrontiers.com/2026/01/06/has-quantum-advantage-been-achieved/
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Zlatko Minev
4 months ago
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...
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Rafael Wagner
The Tattooed Professor
4 months ago
Why are academic societies still on X it must violate all their code of conducts?
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Margaret Harris
4 months ago
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 you’re a physicist/astronomer/science teacher/something else relevant, follow them & show them some love!
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Ernesto Galvão
4 months ago
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...
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Estimation of multivariate traces of states given partial classical information
Bargmann invariants of order $n$, defined as multivariate traces of quantum states $\text{Tr}[{\ensuremath{\rho}}_{1}{\ensuremath{\rho}}_{2}...{\ensuremath{\rho}}_{n}]$, are useful in applications ran...
https://journals.aps.org/pra/abstract/10.1103/mrpz-xq28
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Jonte Hance
5 months ago
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/...
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Jonte R. Hance - IYQ 2025
Dr. Jonte R. Hance is an early-career researcher already making notable advances to foundational and applied quantum science. Despite only completing their PhD in March 2023, they have published 26 ar...
https://quantum2025.org/quantum-100/jonte-r-hance/
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Thrilled to share that I have been awarded the very prestigious Alexander von Humboldt Postdoctoral Fellowship! :)
#HumboldtFellowship
5 months ago
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Alex Pozas-Kerstjens
5 months ago
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/
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Spring School on Near-Term Quantum Computing
https://www.benasque.org/2026ntqc/
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Mark M. Wilde
5 months ago
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?
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Rafael Wagner
Error Correction Zoo
5 months ago
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.
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Quantum Journal
5 months ago
Newly published in Quantum: Consistent circuits for indefinite causal order by Augustin Vanrietvelde, Nick Ormrod, Hlér Kristjánsson, and Jonathan Barrett
doi.org/10.22331/q-2...
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Consistent circuits for indefinite causal order
Augustin Vanrietvelde, Nick Ormrod, Hlér Kristjánsson, and Jonathan Barrett, Quantum 9, 1923 (2025). Over the past decade, a number of quantum processes have been proposed which are logically consistent,...
https://quantum-journal.org/papers/q-2025-12-02-1923/
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Probably -- as far as I know -- the first contextuality-based quantum information advantage from the Google Quantum AI team.
scirate.com/arxiv/2512.0...
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Quantum-Classical Separation in Bounded-Resource Tasks Arising from Measurement Contextuality
The prevailing view is that quantum phenomena can be harnessed to tackle certain problems beyond the reach of classical approaches. Quantifying this capability as a quantum-classical separation and de...
https://scirate.com/arxiv/2512.02284
5 months ago
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New preprint out! 🎉 I’ve just submitted my
#PhD_thesis
to the
#arXiv
. Chapter 7 contains several new constructions and a few new results on the geometry of sets of Bargmann invariants. Most notably, in Theorem 7.13 I prove the convexity of a broad class of sets of (tuples of) unitary invariants.
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Coherence and contextuality as quantum resources
In this thesis, we explore the intersection of two fundamental subfields of quantum information theory: quantum coherence and contextuality. Despite their apparent differences, both areas address key ...
https://arxiv.org/abs/2511.16785
6 months ago
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arxiv.org/abs/2511.15806
If correct, that's a huge result!
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https://arxiv.org/pdf/2511.15806
6 months ago
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Rafael Wagner
Nature Reviews Physics
6 months ago
Review: Ultrafast physics with structured light ⚛️ by Yiqi Fang, Zijian Lyu & Yunquan Liu
www.nature.com/articles/s42...
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Ultrafast physics with structured light - Nature Reviews Physics
Spatiotemporal structuring of optical fields offers opportunities to probe and control electron motions in light–matter interactions. This Review discusses the recent advances in both fundamental phys...
https://www.nature.com/articles/s42254-025-00887-5?utm_source=bluesky&utm_medium=social&utm_campaign=natrevphys
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Rafael Wagner
Henry Yuen
6 months ago
My student
@johnbostanci.bsky.social
, Chinmay Nirkhe, Jonas Haferkamp, and Mark Zhandry have put out a tour-de-force paper that shows, relative to a classical oracle, QMA is stronger than QCMA -- i.e., quantum proofs >> classical proofs. Congratulations to the authors!
arxiv.org/abs/2511.09551
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Separating QMA from QCMA with a classical oracle
We construct a classical oracle proving that, in a relativized setting, the set of languages decidable by an efficient quantum verifier with a quantum witness (QMA) is strictly bigger than those decid...
https://arxiv.org/abs/2511.09551
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Dulwich Quantum Computing
6 months ago
Well-informed and accurate takes on the current state of quantum computing by
@dangaristo.bsky.social
. Good listen if you're outside the field or just entering it and want to get an honest picture. Kudos for using the term "physics experiment" instead of "computer", and for coining "quantum FOMO".
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Jonathan Oppenheim
6 months ago
A recent
@nature.com
article claims that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglement, it would be mediated by the quantised matter interaction, and not gravity.
scirate.com/arxiv/2511.0...
🧪⚛️
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Classical gravity cannot mediate entanglement
In Nature, 646, 813 (2025), Aziz and Howl claim that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglem...
https://scirate.com/arxiv/2511.07348
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Sean Carroll
6 months ago
Day 2 of the
#NaturalPhilosophy
Symposium concluded with a panel discussion featuring the day's speakers: Alan Guth, Jennifer Nagel, David Albert, Simon DeDeo, Emily Riehl, and Anil Seth. Stay tuned for the exciting final day of the Symposium!
www.youtube.com/watch?v=Apnv...
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Dan Garisto
6 months ago
The neat thing about writing about foundations of quantum mechanics is that it makes everyone mad, often for completely different reasons.
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Mark M. Wilde
6 months ago
I wouldn't worry about a QIP reject. The conference is too crowded and big now, and so the PC is desperate to write down meaningless reasons for rejection. In my opinion, the smaller conferences are more significant these days, where more meaningful research interactions can take place.
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Ross Duncan
6 months ago
Our new Helios quantum computer. Read all about it.
arxiv.org/abs/2511.05465
#quantum
#quantumcomputing
#quantinuum
#helios
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Helios: A 98-qubit trapped-ion quantum computer
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features $^{137}$Ba$^{+}$ hyperfine qubits, all-to-all c...
https://arxiv.org/abs/2511.05465
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Rafael Wagner
Matthias Rosenkranz
6 months ago
Our new quantum computer Helios is out. Take a look at this paper for technical details of its design, operations, and benchmarks.
arxiv.org/abs/2511.05465
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Helios: A 98-qubit trapped-ion quantum computer
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features $^{137}$Ba$^{+}$ hyperfine qubits, all-to-all c...
https://arxiv.org/abs/2511.05465
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Had a great time in Paris! Talked about our recent preprint
arxiv.org/abs/2509.10949
#QuiDiQua3
was great, lots of greats discussions, and talks. Happy also to catch up on some good friends :) Can't wait for
#QuiDiQua4
(next year in Brussels!)
#QuantumInfo
#Contextuality
#QuantumOptics
6 months ago
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Felix Leditzky 🏳️🌈🏳️⚧️
6 months ago
Department of Physics at UIUC is looking for an Assistant Professor in Theoretical Quantum Information Science, including, but not limited to, quantum error correction, quantum optics, quantum algorithms, and AMO physics. Application deadline: Dec 1
illinois.csod.com/ux/ats/caree...
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Grainger Engineering: Assistant Professor in Theoretical QIS - Department of Physics
Duties & Responsibilities
https://illinois.csod.com/ux/ats/careersite/1/home/requisition/15343?c=illinois
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