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Ernesto Galvão

@efgalvao.bsky.social
367 followers 308 following 137 posts

Associate Professor at the Physics Institute of Universidade Federal Fluminense (UFF) in Niterói, Brazil. My research is on quantum computation (especially photonic) and foundations of quantum theory. sites.google.com/view/efgalvao/home

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Reposted by Ernesto Galvão
Clément Canonne @ccanonne.github.io · 4h
"We want to encourage authors to be mindful with their work, taking care that they are submitting something substantial of scholarly interest that meets arXiv's guidelines and standards." 2 submissions per month, 3 active submissions blog.arxiv.org/2026/10/01/u... (per submitter, not listed author)
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maura quint @mauraquint.bsky.social · 22h
Yes every woman has been harassed, many assaulted. But every woman has also experienced invisible loss from moments she avoided harassment. She felt a space becoming unsafe, so she left, while men stayed on. And in leaving, she lost: opportunities, experiences, learning, promotions, even simply fun.
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Benjamin @benjaminschneider.ch · 30/09/2026
Werner Herzog will be the last human being whose next word no language model can predict
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Ernesto Galvão @efgalvao.bsky.social · 30/09/2026
New preprint out! This is joint work with Marco Robbio (ULB, INL), Michał Oszmaniec (CTP- Warsaw), Nicolas Cerf (ULB), and Leonardo Novo (INL): scirate.com/arxiv/2609.3... (1/n)
scirate.com
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Clément Canonne @ccanonne.github.io · 29/09/2026
A very important message from Omer Reingold to our TCS community, especially us (arg, already) senior researchers: "snap out of it." Please, digest, and share. theorydish.blog/2026/09/29/s...
As for depression: the next time you have the urge to lament, or even celebrate, being “the last generation of human mathematicians,” perhaps keep it to yourself. Contemplating the end of your profession from the relative comfort of an established, tenured career is a privilege, and it comes with responsibilities. Senior academics are not merely individual researchers; we are stewards of our field, and we owe our junior colleagues active leadership rather than abandonment.
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comp_phys_marc @marcusedwards.me · 26/09/2026
Vote for your favourite #quantum themed MacBook!
Three MacBooks with quantum themed stickers
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Katie Mack @astrokatie.com · 23/09/2026
Excited to reflect, absorb, and emit light EXTRA WELL today ✨💃⚡️ #BiVisibilityDay
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Maris Ozols @marisozols.bsky.social · 22/09/2026
Here are my immediate thoughts I sent to the new Advisory Group on Mathematics and Artificial Intelligence. terrytao.wordpress.com/2026/09/21/a...
terrytao.wordpress.com
Announcing the Advisory Group on Mathematics and Artificial Intelligence
[This is a guest post by the Advisory Group on Mathematics and Artificial Intelligence. This blog post was initially written in a different file format and converted using AI. — T.] We would …
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IQOQI Innsbruck @iqoqi.bsky.social · 18/09/2026
📢 IQOQI Innsbruck is hiring! Applications open for the 2027 IQOQI Prize Postdoctoral Fellowship in Quantum Science — 2 yrs (+optional 3rd), competitive salary, attractive benefits. Deadline: Sept 30, 2026 Apply now: iqoqi.at/en/apply/iqo... #quantumphysics #postdoc #hiring #academicjobs
A hand on a screw adjusting technical utility. Text: IQOQI Postdoctoral Fellowship. Call 2027 is now open!
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Ernesto Galvão @efgalvao.bsky.social · 15/09/2026
Terry Tao @teorth.bsky.social has invited a number of mathematicians to guest post in his blog on their thoughts on AI and mathematics, in an interesting, thoughful exchange of ideas. terrytao.wordpress.com/2026/09/14/w...
terrytao.wordpress.com
Why I do mathematical research
[This is a guest post by Emily Riehl. This blog post was initially written in a different file format and converted using AI. — T.] Like many mathematicians, I was drawn to the field as a lit…
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Nirmalya Kajuri @kajunut.bsky.social · 13/09/2026
Deeply saddened to learn that Rafael Sorkin is no more. One of the deepest and most original thinkers of quantum gravity and the pioneer of causal set theory, he was also among the nicest, gentlest physicists I have met.
image of rafael sorkin
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Greg Egan @gregegansf.bsky.social · 14/09/2026
TIL from @dandkuniverse.bsky.social that you can sometimes hear meteors burning up in the atmosphere *at the same time as you see them*, despite the discrepancy in the speed of light and the speed of sound. How? Here is an abstract from a relevant paper:
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Juan José García-Ripoll @jjgarciaripoll.bsky.social · 12/09/2026
As part of the development of our new institute and CSIC’s broader quantum strategy, we are exploring the creation of two new positions focused on technology transfer, industry engagement, and project management. This is an exploratory call ... 1/2 quarc.csic.es/jobs/two-pro...
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Terence Tao @teorth.bsky.social · 11/09/2026
A group of 25 Fields Medalists, including myself, have made a joint declaration on Math and AI: mathandai.org . We welcome additional signatories. See also this article in the Economist announcing the declaration: www.economist.com/science-and-...
mathandai.org
Declaration — Math and AI
Read the declaration and add your name.
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Quanta Magazine @quantamagazine.org · 11/09/2026
Introducing Transformation, Quanta Magazine’s weekly bulletin chronicling the latest news in math and AI — and what it means for mathematics as a whole, written by @kkakaes.bsky.social. Read our first post: www.quantamagazine.org/updates/tran...
quantamagazine.org
Transformation | Quanta Magazine
A weekly dispatch exploring the latest news in math and AI…
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Ernesto Galvão @efgalvao.bsky.social · 10/09/2026
Mostly also applies to theoretical physics, nice read.
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Grant @syncingsinking.bsky.social · 10/09/2026
This is just to say I have solved the open questions that were in your paper and which you were probably saving for your phd students Forgive me they were delicious so incentive-laden and followed so readily once your postdoc's drafts mysteriously found their way into my training data
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Robin Kothari @robinkothari.bsky.social · 10/09/2026
Traditionally, QIP served many roles (e.g., disseminating important results and recognizing great work). AI is now forcing us to decouple some of these roles. I believe QIP's primary acceptance criterion should be: "Will this talk be a good use of the audience's time?" (2/4)
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John C. Baez @johncarlosbaez.bsky.social · 08/09/2026
OpenAI claims formal proof that Navier-Stokes solutions can blow up. They used 10,000 agents simultaneously, who sent 2.7 million messages and used ~130 billion output tokens. "Not without controversy" - whew, what an understatement!
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Ernesto Galvão @efgalvao.bsky.social · 07/09/2026
Practical tips on using AI effectively for research in theoretical physics.
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John C. Baez @johncarlosbaez.bsky.social · 03/09/2026
Terence Tao says: there's an emerging consensus on how to solve one of the $1,000,000 Millennium prize problems. He says AI may help and lead to new insights - but it may solve the problem in a way that gives no new insights! Read what he wrote here: mathstodon.xyz/@tao/1172078...
Terence Tao from https://mathstodon.xyz/@tao/117207849921390904 :

But there is now a scenario in which an autonomous AI harness, backed by an enormous amount of computational resources, performs this entire iteration internally, and ends up producing the final ansatz, and thence the solution to the Navier-Stokes regularity problem, while the AI company running the harness keeps the process to arrive at that ansatz almost completely out of public view.  Technically, one of the most prominent open problems in mathematics would now be solved; but there would be almost no value added to mathematics as a consequence.  It is theoretically possible that with some herculean (and heavily AI-assisted) additional effort by a third party, some portion of the process could be reverse-engineered to recover some actual insight and understanding from the solution; but this would be a far less efficient process than if the solution had been obtained via a diverse combination of both human mathematicians and machine assistance as mentioned above. (5/6)
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Dave Richeson @divbyzero.bsky.social · 26/08/2026
Thank you, @moduality.bsky.social for pointing out the weird shadows of my impossible objects. That got me to think of yet another way to show how weird they are. Here, a light is shining down from behind at a 45° angle!
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Stefano Gogioso @stego.bsky.social · 13/08/2026
Every week I grow more firmly convinced that the US frontier AI labs have been significantly over-invested into. Commoditisation is the inevitable end state of these technologies: Apple is leading the local AI hardware charge, Chinese labs are supplying the software. 👇 unsloth.ai/docs/models/...
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Jonathan Oppenheim @postquantum.bsky.social · 10/08/2026
In the meantime, some great news: We’ve been awarded a gift from the David and Elaine Potter Foundation, and in October, we will be launching the David Potter Institute for Quantum Information and Spacetime, @ucl.ac.uk . www.ucl.ac.uk/news/2026/au... More info at www.ucl.ac.uk/mathematical... 2/2
ucl.ac.uk
£8 million gift to create quantum institute at UCL
The new David Potter Institute for Quantum Information and Spacetime, established thanks to a landmark award from the David and Elaine Potter Foundation, will seek to reconcile quantum mechanics and g...
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Ernesto Galvão @efgalvao.bsky.social · 07/08/2026
New paper out in JOSA B! This is joint work with Wagner Balthazar (IFRJ), Quinn Palmer, Alex Jones, and Jake Bulmer (Bristol). We show how to simulate linear optics with Fock states using Feynman path sums - open source code available. Thank you to my collaborators! opg.optica.org/josab/fullte...
doi.org
Radware Captcha Page
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Mark M. Wilde @markwilde.bsky.social · 04/08/2026
why would I ever again share a well formulated open research question in an open problems session of a conference?
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Ernesto Galvão @efgalvao.bsky.social · 02/08/2026
New paper out in Quantum Science & Technology! Sara Franco (INL, Minho) Anita Camillini (INL, CINECA) and myself show a way to do interaction-free imaging of multiple objects using a single photon, featuring experiments using @quandela.bsky.social 's Ascella chip. iopscience.iop.org/article/10.1...
iopscience.iop.org
Interaction-free measurement of multiple objects using a universal integrated photonic processor
Interaction-free measurement of multiple objects using a universal integrated photonic processor, Franco, Sara, Camillini, Anita, Galvão, Ernesto F
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Nicolai Friis @improbabilitydrive.bsky.social · 02/08/2026
This text has moved me deeply. I think we, as a species, have opened a door that we cannot close anymore. It will bring many advances, and some good will hopefully come from that, but we pay a price, the price of losing something profound. kirwinhampshire.substack.com/p/the-dark-n...
kirwinhampshire.substack.com
The Dark Night of Mathematics
What are we really doing?
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Clément Canonne @ccanonne.github.io · 01/08/2026
"We're all worried," as what it means to do research (in my field, Theoretical CS) seems to be shifting, and shifting fast. What to do? Senior researchers must lead by example, knowing that not everything will pan out. What I'm suggesting below may not work everywhere, but here's my own advice: 1/
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Marco Piani @marcopiani.bsky.social · 28/07/2026
It only goes up from here, in terms of AI capabilities, and if you think about the rate of progress of the past couple of years, it is hard to imagine where we will stand in two more years.
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arXiv bot (quant-ph) @krxiv-quant-ph.bsky.social · 28/07/2026
Coherence as a resource for $N$-box and quantum pigeonhole paradoxes arxiv.org/pdf/2607.24282 Som Kanjilal, Rafael Wagner, Ernesto F. Galvão.
arxiv.org
https://arxiv.org/abs/2607.24282
arXiv abstract link
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Ernesto Galvão @efgalvao.bsky.social · 28/07/2026
New preprint out! Joint work with Som Kanjilal (INL) and @quantumrw.bsky.social (Ulm). We show pre- and post-selection paradoxes in quantum mechanics require both weak value anomaly and coherence to happen. Examples: 3-box, pidgeonhole paradoxes. Thanks Som and Rafael! arxiv.org/abs/2607.24282
scirate.com
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Ernesto Galvão @efgalvao.bsky.social · 25/07/2026
Insightful Simons Institute talk by Hsin-Yuan Huang (Caltech), on the automation of research, featuring real-life problems researchers are facing, and lively discussion with the audience. It's a topic that's constantly on my mind. simons.berkeley.edu/talks/hsin-y...
simons.berkeley.edu
How to Respond to the Automation of Research
Research used to hold a sacred place in human society. As we are all seeing firsthand, research is being automated by machines at a rapid pace. I will share some recent experiences and discuss what wi...
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The New Quantum Era @newquantumera.com · 25/07/2026
Demonstrating the requisite bravery, well done, Science. “The Trump administration hates academic science funding…They want to keep all that money for themselves, to hand out to favored cronies who can help them get elected and to steer yet more money and more power back into their hands.”
science.org
The Assault On Science Funding Continues
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Marco Cerezo @mvscerezo.bsky.social · 25/07/2026
We know LLMs can one-shot quantim information papers now, and even write decent manuscripts. What's the consensus of proper practice for what to do with those AI-generated papers? I review the proof, I sign my name, acknowledge the it is AI made, put it on arxiv, rinse, repeat?
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Rafael Wagner @quantumrw.bsky.social · 24/07/2026
It is very hard for women in science to remain productive, competitive with male peers and colleagues, etc... It is *especially hard* for Mothers in Science. For that, check out this initiative for researchers in STEMM! www.mothersinscience.com Share it! Make it visible!
mothersinscience.com
Mothers in Science
We are a global nonprofit organization that advocates for mothers in STEMM and creates evidence-based solutions to promote workplace equity and inclusion of caregivers.
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Zlatko Minev @zlatko-minev.bsky.social · 20/07/2026
Google has two open research calls: early fault-tolerant algorithms, and securing the quantum computer itself — side channels, control pulses, user isolation. Not post-quantum crypto. Up to $100k, closes Aug 7. research.google/programs-an...
research.google
Google Academic Research Awards
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Ernesto Galvão @efgalvao.bsky.social · 29/06/2026
New paper out in Light: Science & Applications! This is joint work with colleagues from UFF, INL, Milan, and Fabio Sciarrino's group in Sapienza Univ., Rome. We demonstrate counter-intuitive bunching phenomena using integrated photonic chips. Thank you to my amazing collaborators! rdcu.be/fq0mk
rdcu.be
Experimental observation of counter-intuitive features of photonic bunching
Light: Science & Applications - Experimental observation of counter-intuitive features of photonic bunching
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Ivan Šupić @quantumsupic.bsky.social · 10/06/2026
PhD opportunity in QIT in Grenoble. I am advertising a project through the QuanG2 call, at the interface of nonlocality, self-testing, computationally bounded devices, complexity, and crypto. My project is among the topics offered: phdquantumgrenoble.univ-grenoble-alpes.fr/phd-applicat...
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Steven Strogatz @stevenstrogatz.com · 02/06/2026
This terrific article by Siobhan Roberts could help elevate the public discussion of AI in mathematics. The interview about the Leiden Declaration is especially helpful. www.nytimes.com/2026/06/02/s...
nytimes.com
As A.I. Makes Strides in Mathematics, Mathematicians Urge Caution
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Timothy Gowers @wtgowers.bsky.social · 20/05/2026
OpenAI's claim that this is a central conjecture in discrete geometry is not an exaggeration. This will I think be looked back on as the first time that AI solved a major mathematics problem (defined as a problem that all experts in some subfield had thought about). openai.com/index/model-...
openai.com
An OpenAI model has disproved a central conjecture in discrete geometry
An OpenAI model solved the 80-year-old unit distance problem, disproving a major conjecture in discrete geometry and marking a milestone in AI-driven mathematics.
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Ernesto Galvão @efgalvao.bsky.social · 19/05/2026
Congrats to Mafalda Ramôa, the newest-minted PhD of Univ. Minho! David Arvidsson-Shukur (Cambridge), Jarrod McClean (Google), and André Sequeira (INESC-TEC) participated as examiners. Congrats on your brilliant work Dr. Mafalda! I, Luís Paulo Santos and Sophia Economou were the happy co-supervisors.
Picture of Mafalda Ramôa during her thesis defense, participating both in-place and online, as two co-supervisores and one examiner were online only.Picture of Zoom call, featuring Mafalda and thesis examiners.
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Rebecca Brückmann @historleans.bsky.social · 17/05/2026
Your time will come. 🗃️🎓
Screenshot (white letters on black background) of a post by Leslie Berntsen.
Flight attendant: Is there a doctor on board?
Me: Yes, but I’m not that kind of…
Flight attendant: It’s 11:52 PM and the passenger in 37F has a conference abstract due in seven minutes. It’s currently 50 words over the limit.
Me: Okay. I’m here.
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Ernesto Galvão @efgalvao.bsky.social · 11/05/2026
New preprint in collaboration with @quantumrw.bsky.social (Ulm)! We show a simple way to determine commutativity of states or observables in a basis-independent way, using unitary (Bargmann) invariants. This bypasses costly tomography for this classicality test. scirate.com/arxiv/2605.0...
scirate.com
Commutativity from a single Bargmann invariant equality
Noncommutativity of states and observables is a fundamental signature of quantum theory, and a minimal requirement for nonclassicality. We provide a universal necessary and sufficient condition for pa...
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I AM DAD @iamdad.bsky.social · 10/05/2026
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Ernesto Galvão @efgalvao.bsky.social · 11/05/2026
Modern-day Benjamin Franklins!
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Juan José García-Ripoll @jjgarciaripoll.bsky.social · 23/04/2026
Today, as part of our Strategy on Quantum Technoolgies, @csic.es announced the creation of a new research institute in Madrid, the Quantum Advanced Research Center or QuARC @quarc-csic.bsky.social This new institute launches now with 24 PIs and a total of 100 researchers 1/ quarc.csic.es
quarc.csic.es
Quantum Advanced Research Center
Quantum Advanced Research Center
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Ernesto Galvão @efgalvao.bsky.social · 13/04/2026
New paper out on PRA! Together with Antonio Zelaquett Khoury and his experimental team at UFF, we apply quantum information tools to witness dimension and coherence in classical fractional orbital angular momentum states of a laser beam. journals.aps.org/pra/abstract...
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Chris Ferrie @csferrie.com · 10/04/2026
McDoing is a great term to describe the modern trivialization of existentialism as consumable performance. Anguish is content, commitment is a vibe.
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