Review: Ultrafast physics with structured light ⚛️ by Yiqi Fang, Zijian Lyu & Yunquan Liu www.nature.com/articles/s42...

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

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".

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... 🧪⚛️

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...

The neat thing about writing about foundations of quantum mechanics is that it makes everyone mad, often for completely different reasons.

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.

Our new Helios quantum computer. Read all about it. arxiv.org/abs/2511.05465 #quantum #quantumcomputing #quantinuum #helios

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

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

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...

Happy to share our TEDx talk where me and my twin @antonioannamele.bsky.social chat about quantum technologies! (Italian only) youtu.be/yzXUsDUPt8A?...

#QuiDiQua3 alert!! Happy to be in Paris for such a nice conference in quantum info, optics, and foundations all linked by quasiprobability distributions!

Now under construction: The bridge connecting research on quantum matter and quantum information in the Ginsburg Center @caltech.edu to the high energy theory group in Downs-Lauritsen Laboratory. Exciting!

People take for granted the fact that mangos are so delicious, but most don’t know that every logical mango is made out of many physical mangos.

The Paul Ehrenfest Best Paper Award for #Quantum Foundations for 2024 has been awarded to Rainer Verch and Chris Fewster in recognition of their outstanding paper, “Quantum Fields and Local Measurements.” Congratulations!

Learn more about this discovery in the scientific paper on "Error detection without post-selection in adaptive quantum circuits". 🔬: arxiv.org/abs/2509.25326

I am super happy to have finished my #PhD in #Quantum!! Thank you all for my friends and for my amazing supervisors!! I am super happy! Soon I'll post my thesis on arXiv :)

Thinking of patenting my favorite method for ranking researchers: reading their papers and deciding whether they are good.

Gold

I also think its a bit weird that the paper has not addressed many known mechanisms/no-go theorems showing that this is indeed impossible. Which aspects of these theorems are you avoiding? This work is only bringing confusion to an already delicate highly interdisciplinary research topic.

As promised... No, classical spacetime can’t produce entanglement. I can create entanglement by turning a knob on a laser, but the knob isn't mediating entanglement. Is the knob "producing" the entanglement? This week's Nature paper is causing confusion! superposer.substack.com/p/no-classic... 🧪⚛️

“The public has a distorted view of science, because children are taught in school that science is a collection of firmly established truths. In fact, science is not a collection of truths. It is a continuing exploration of mysteries” Freeman Dyson (1923–2020), in "How We Know", 2011

Ruhende HI-Viren aus der Deckung holen: Das kann ein körpereigenes Protein🦠, das als Vitamin-A-Transporter 🚚bekannt ist. Ulmer Forschende haben diesen natürlichen Wirkstoff zur Latenz-Umkehr entdeckt. Die ist ein weiterer Schritt in Richtung AIDS-Heilung. t1p.de/RBP4 *wt/🔬: Pastorio #uulm

With a long transfer from the Sahara to Fes, I finally finished going through the starter packs below. It was great to see everything you all have been working on! I like to spend some time reading through each profile, so I start to remember who's working on what. Please comment more starter packs!

What if the measurement problem isn't about explaining how the classical world emerges from the quantum world... ...but about what happens when quantum systems interact with something that's already classical? Turns out, the collapse postulate + Born rule emerge! scirate.com/arxiv/2510.0... 🧪⚛️🧵1/5

Rudi B. P. Pietsch, one of the PhD Students I co-supervise (with prof. Plenio) here at the University of Ulm #UniUlm recently published his first ever research article at #PRA! Huge congrats to Rudi and Dani! Its the first of many : ) #QuantumThermodynamics journals.aps.org/pra/abstract...

New (single-author) work: If you simply switch on a typical short-range Hamiltonian for constant time and then measure, the resulting distribution is generically intractable for classical computers. scirate.com/arxiv/2510.0...

Can't wait to drink contextual tea

Scuola normale decided to put every quantum physics preprint on arXiv to appear today

Quantum arXiv today.

Nobel coverage is fast-paced, and there's often not time to reflect on the accomplishment before the next one. (Congrats to the Chem laureates, by the way.) My day two story on why Clarke, Devoret, and Martinis were looking for macroscopic quantum tunneling and how they managed the tricky search:

Okay, last post on *quantum learning theory with CV systems* (for a few months🫣) Today's new work tackles another natural and central question in this rapidly developing field: Given an unknown CV state, how to test whether is it Gaussian or not? arxiv.org/pdf/2510.07305 1/

Happy physics Nobel Prize to all my superconducting-qubit friends!

Nobel prize for physics goes to physics this year

My dream conference

Can you correct both X and Z quantum noise using only a bit-flip classical codes? The answer is a surprising YES, using only ONE additional qubit and some post-processing! Check out our new work to see how: scirate.com/arxiv/2510.0...

Have you ever wondered why we describe circuits with matrices? I mean, circuits are about tensor products, while matrices are about direct sums. This new paper with Louis Lemonnier and @manchegobaby.bsky.social gives a practically useful explanation: arxiv.org/abs/2510.05032.

Today #quantum article selection: - Tradeoff between rate, distance and accessibility of FT codes - quantum sensor of superconductivity - Quantum simulation of spectroscopy - Quantum state preparation - Mitigating the barren plateau More details and links below:

You think we already have enough entropies and divergence measures? I don't think so! In our latest work (arxiv.org/abs/2509.20472), we introduce yet another information theoretic measure -- the computational relative entropy. Let's have a quick rundown👇

Via #OPG_OpticaQ: Variational quantum cloning machine on an integrated photonic interferometer opg.optica.org/opticaq/full... #QuantumInformation #IntegratedPhotonics

I've heard this opinion in quantum circles a few times: NISQ-level circuit transpilation/routing/optimization is a solved problem, and we should invest all efforts into QEC transpilers. I feel we're too eager to skip the reality of NISQ. It's here, we're here, and the software is not good.

Hey quantum bsky! Does any have any experience with becoming a Trusted Reviewer for Springer? Seems like the commitment is quite high for getting that title; you need to review one paper a month for them. Interested in hearing anyone's thoughts on this.

Most quantum information scientists detest the noise that erodes the performance of quantum computers. QuICS postdoctoral fellow Yuxin Wang sees the glass as half-full: noise is a fascinating subject to study. From this week's JQI Seminar.

Duolingo now has Chess!

Two recent works joint w/ Hemant Mishra and @ludovicolami.bsky.social are ripe for quantum optics experimentalists to consider: arxiv.org/abs/2303.04949 arxiv.org/abs/2505.20447 1st paper proves that the pretty good measurement for a bosonic Gaussian ensemble is a bosonic Gaussian measurement 1/2

Just published a Stim implementation of the [[16,4,4]] Tesseract code - the one used in Microsoft+Quantinnum's QECC experiment last year. Simulation can be used to quickly benchmark the code under various parameters. Contributions are welcome. github.com/DeDuckProjec...

work on the rolls royce of quantum computers rollsroyce.wd3.myworkdayjobs.com/professional...

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...