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Elies Gil-Fuster

@eliesgf.bsky.social
433 followers 229 following 97 posts

Researcher in the making. Loves music and boardgames. 'we didn't come here to pet spiders'. eliesgilfuster.eu.

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Elies Gil-Fuster @eliesgf.bsky.social · 15/09/2026
Nothing new, but: the @deutschebahn.com again destroyed my productivity for the whole day. Every time this happens, I'm more likely to take a plane next time. I wonder what's the solution, and I wonder whether this should be a talking point in the upcoming election.
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Ricard Solé @ricardsole.bsky.social · 02/08/2026
Megafires, floods, extreme weather and rising heat deaths were predicted by climate models more than 30 years ago. Now the window for action is rapidly closing, and science warns of a far greater crisis ahead. What are we going to do? repositori.upf.edu/server/api/c...
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Elies Gil-Fuster @eliesgf.bsky.social · 30/07/2026
Last week we posted a super-exciting work, on #DoubleDescent in #QuantumMachineLearning, specifically for usual gradient-trained #ParametrizedQuantumCircuits: arxiv.org/abs/2607.21409 The Germany-Netherlands Academia-Industry collaboration was spear-headed by Marie Kempkes, who is just great!
arxiv.org
Cautious optimism for deep parameterized quantum circuits
A central challenge in quantum machine learning is understanding the scaling behavior of parameterized quantum circuits (PQCs). In particular, it remains unclear how their performance on unseen data c...
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Elies Gil-Fuster @eliesgf.bsky.social · 25/07/2026
Today I learned: la Marseillaise was written by Claude.
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Elies Gil-Fuster @eliesgf.bsky.social · 16/07/2026
Yay! Forms are so much fun 🎉🎊 If you're a quantum researcher, we would love it if you could fill the form (<10 minutes) and share it with your network. Thanks!
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Elies Gil-Fuster @eliesgf.bsky.social · 06/07/2026
Opinion: should I be ashamed of asking editors / area chairs "in your opinion, does this submission look like AI slop?" before accepting / declining an invitation to review? #research #peerreview #aislop
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Elies Gil-Fuster @eliesgf.bsky.social · 14/05/2026
My fallback career choice is to open a restaurant called "Margherita & Margarita".
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Elies Gil-Fuster @eliesgf.bsky.social · 06/05/2026
I had missed this blogpost by @e6peters.bsky.social, it's really good! (The previous ones are also really good, but I didn't miss those :P) peterse.github.io/2025/09/06/Q...
peterse.github.io
Is QEC eating quantum?
Quantum error correction (QEC) is a hot research topic among quantum computing researchers. This is a short analysis of just how popular QEC is.
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Sam Power @spmontecarlo.bsky.social · 25/04/2026
davidbessis.substack.com/p/the-fall-o... An interesting read, with lots of food for thought. It reminds me of my enthusiasm for "mathematical clean-up work", i.e. going back to the foundations of a topic, making the constants sharper, proofs nicer (and more modern), and the like.
davidbessis.substack.com
The fall of the theorem economy
How AI could destroy mathematics and barely touch it
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Elies Gil-Fuster @eliesgf.bsky.social · 20/04/2026
#QCTiP 2026: come for the talks, stay for the socks!
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Elies Gil-Fuster @eliesgf.bsky.social · 19/04/2026
Good evening Oxford, ready for QCTiP! Excited to catch up with cool people and cool research 😄
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Elies Gil-Fuster @eliesgf.bsky.social · 17/04/2026
Today we posted a new pre-print on #QuantumKernels: scirate.com/arxiv/2604.15214 This time, instead of searching for kernels that achieve quadvantage and whatnot, we concentrate on how to perform inference: how to best evaluate a learned hypothesis on new data. #QML & #QuantumAlgorithms!
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Elies Gil-Fuster @eliesgf.bsky.social · 31/03/2026
After several years of being young, today I got old: today was the last time I attended an opera with the crazy discounts you get in Berlin for being under 30. I guess I'll need to start making millions now. I had a good closure though: der Rosenkavalier at the Staatsoper!
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Elies Gil-Fuster @eliesgf.bsky.social · 25/03/2026
New #QML paper alert! 📝🧠⚛️ 🧐 A PAC-Bayesian approach to generalization for quantum models arxiv.org/abs/2603.22964 This collaboration involved some seriously hard and fun work by @pablones8.bsky.social, Matthias Caro, Carlos Bravo-Prieto, @fjschreiber.bsky.social, and @jenseisert.bsky.social
arxiv.org
A PAC-Bayesian approach to generalization for quantum models
Generalization is a central concept in machine learning theory, yet for quantum models, it is predominantly analyzed through uniform bounds that depend on a model's overall capacity rather than the sp...
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BSC-CNS @bsc-cns.bsky.social · 20/03/2026
🎆 Congratulations to Sergi Masot Llima, from the Quantic group, on the successful defence of his #PHD thesis! 🙌 Well done, Sergi! Wishing all the best in your career ahead. #BSCTalent
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Elies Gil-Fuster @eliesgf.bsky.social · 06/03/2026
Thanks @markwilde.bsky.social for illuminating our learning & algorithms seminar with your views on #QBM s, we had a blast :)
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Elies Gil-Fuster @eliesgf.bsky.social · 28/02/2026
To be honest I always thought this is what would happen. Any part of a system that can be fully off-loaded to an automated algorithm could in-principle be removed entirely from the system. No?
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Elies Gil-Fuster @eliesgf.bsky.social · 17/02/2026
I just misunderstood someone, thinking they said "Parametrized Quantum Circus", and tbh I find it quite relatable #QML 🎪🤡 New goal: become known as a quantum clown.
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Elies Gil-Fuster @eliesgf.bsky.social · 17/02/2026
The bad thing about January being way colder than usual, is that now February being as cold as usual is shattering my willpower.
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Elies Gil-Fuster @eliesgf.bsky.social · 20/01/2026
Woooooow I wasn't aware @terriblemapshq.bsky.social is on bluesky! This alone made my day. Let's roll!
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Richard Kueng @richardkueng.bsky.social · 08/01/2026
This year's Quantum Computing Theory in Practice Conference (QCTiP) is scheduled for 04/20/2026-04/25/2026 in Oxford, UK 🇬🇧: qctipconf.github.io Talk submission deadline is just round the corner: 01/11/2026. Looking forward to many exciting contributions and a great time in Hogwarts🪄, aehm Oxford🎓.
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ICREA Community @icreacommunity.bsky.social · 29/12/2025
#NousICREAs2025 |📊 Gergely Neu (@neu-rips.bsky.social @upf.edu) estudia els fonaments de l’aprenentatge automàtic i IA, amb l’objectiu de desenvolupar algoritmes més transparents i robustos, capaços de prendre decisions fiables en el món real. short.do/JYHhN1
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Elies Gil-Fuster @eliesgf.bsky.social · 18/12/2025
Very happy about our new pre-print! Here, we share how we think about potential quadvantage in #QML, from the point of view of the function families that arise from usual Parametrized Quantum Circuits. Please do let us know what you think about our perspective :) scirate.com/arxiv/2512.1...
scirate.com
Prospects for quantum advantage in machine learning from the representability of functions
Demonstrating quantum advantage in machine learning tasks requires navigating a complex landscape of proposed models and algorithms. To bring clarity to this search, we introduce a framework that conn...
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Francisca Vasconcelos @franvasco.bsky.social · 17/12/2025
Very excited to share a new paper with Malvika Joshi, Avishay Tal, and John Wright on “Improved Lower Bounds for QAC^0”! In this work, we prove the strongest known lower-bounds to date for QAC^0 with the full power of polynomially many ancillae. arXiv: arxiv.org/abs/2512.14643
arxiv.org
Improved Lower Bounds for QAC0
In this work, we establish the strongest known lower bounds against QAC$^0$, while allowing its full power of polynomially many ancillae and gates. Our two main results show that: (1) Depth 3 QAC$^0...
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Elies Gil-Fuster @eliesgf.bsky.social · 18/11/2025
Observations from #QTML25: when compared to previous editions, memes-on-slides have been almost entirely replaced by emojis-on-slides 🤔
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Marco Cerezo @mvscerezo.bsky.social · 22/10/2025
Our group is looking to hire postdocs to work at the intersection of quantum computing, quantum algorithms, quantum machine learning, simulation of many-body quantum systems and early-fault tolerant quantum computing Apply here: lanl.jobs/search/jobde... Reposts appreciated!
lanl.jobs
Quantum Computing and Early Fault-Tolerant Simulations at Los Alamos National Laboratory
Los Alamos National Laboratory is Hiring! Search available jobs or submit your resume now by visiting this link. Please share with anyone you feel would be a great fit.
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Richard Kueng @richardkueng.bsky.social · 21/10/2025
(I/III) We're excited to announce a new tenure track opening! The position is called 'quantum informatics' and is affiliated with our QUICK group within the CS+AI division at @jku.at 🇦🇹. Application deadline is November 30th, 2025: www.jku.at/en/the-jku/w...
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Clément Canonne @ccanonne.github.io · 18/10/2025
An academic fact whose importance cannot—absolutely cannot—be overstated: Whoever creates the Overleaf project gets to pick the macros.tex
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Quantiki @quantiki.bsky.social · 07/10/2025
PhD position on quantum computing at at ETH Zurich, advised by Dominik Hangleiter and co-advised by Renato Renner www.quantiki.org/position/phd...
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Elies Gil-Fuster @eliesgf.bsky.social · 07/10/2025
The German saying goes "wer schön sein will muss leiden". My German is not so good, so I understood "wer schön sein will muss *nach* Leiden". Off to spend a couple months @unileiden.bsky.social, to start new projects on #QuantumMachineLearning
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Elies Gil-Fuster @eliesgf.bsky.social · 06/10/2025
Just an observation: my experience flying low-cost in Europe has been approximately constant for 10 years. A similar statement is true about trains and buses. The same is *not* true about cars.
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Johannes Jakob Meyer @jjmeyer.bsky.social · 26/09/2025
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👇
The distracted boyfriend meme, with the "girlfriend" being the relative entropy and the distraction being the computational relative entropy.
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Marco Tomamichel @marcotomamichel.bsky.social · 10/09/2025
Please get in touch if you are interested in a PhD on the mathematics of quantum information and its applications to learning and communication.
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Elies Gil-Fuster @eliesgf.bsky.social · 02/09/2025
This happy pup just registered for #QTML25! So much looking forward 🥳
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Craig Gidney @craiggidney.bsky.social · 31/08/2025
Been awhile since I wrote a blog post. Anyways... why haven't quantum computers factored 21 yet? algassert.com/post/2500
algassert.com
Why haven't quantum computers factored 21 yet?
Craig Gidney's computer science blog
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Francesco Arzani @frarzani.bsky.social · 26/08/2025
Looking for a postdoc to work on bosonic quantum error correction! Join me and the QAT team at ENS & INRIA Paris — flexible start date. Details here 👉 recrutement.inria.fr/public/class... or feel free to reach out!
recrutement.inria.fr
Post-Doctoral Research Visit F/M Senior postdoctoral researcher in bosonic quantum error correction
Offre d'emploi Inria
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Elies Gil-Fuster @eliesgf.bsky.social · 24/07/2025
When I woke up this morning I didn't think I would see my name next to that of a #physics giant. In case you're curious about the paper I presented: arxiv.org/abs/2406.07072
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Elies Gil-Fuster @eliesgf.bsky.social · 18/07/2025
For all the interest in combating climate change you see around Germany, I wonder how many tonnes of CO2 can be traced back to the poor service offered by @bahn.de @bahn.bsky.social. How many people choose to fly or drive a car just to avoid ICE delays and short-notice cancellations.
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Elies Gil-Fuster @eliesgf.bsky.social · 28/05/2025
True or false? The instant the train crew changed from SBB 🇨🇭 to DB 🇩🇪 a 20' delay materialized out of thin air.
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Laura Lewis @laura-lewis.bsky.social · 28/03/2025
With Dar Gilboa and Jarrod McClean, we prove a new quantum advantage for learning periodic neurons in the quantum statistical query model! arxiv.org/pdf/2503.20879 The hardness of this problem was studied long before this work by classical learning theorists. 🔎
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Jens Eisert @jenseisert.bsky.social · 13/03/2025
The registration deadline of the main event of the year on quantum computing theory in practice (#QCTiP2025) will be #tomorrow, anywhere on Earth. qctip2025.com
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Brooke Harrington @ebharrington.bsky.social · 15/11/2024
Listen, Broligarchy is not some cute synonym for oligarchy. It's genuinely different & WAY more dangerous. I'm a sociologist who's been studying the ultra-rich globally for 17 yrs, entering their world as an offshore wealth mgr. Published 2 books abt them. 🧵Broligarchs are distinct in 3 ways:
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Joseph Bowles @josephbowles.bsky.social · 20/01/2025
We recently released a software package to optimize IQP circuits that scales to millions of qubits and gates. Our main motivation was quantum machine learning (paper on the way!), but we believe there could be many other applications. arxiv.org/abs/2501.04776 github.com/XanaduAI/iqp...
arxiv.org
IQPopt: Fast optimization of instantaneous quantum polynomial circuits in JAX
IQPopt is a software package designed to optimize large-scale instantaneous quantum polynomial circuits on classical hardware. By exploiting an efficient classical simulation algorithm for expectation...
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The Hilbert Space Post @hilbertspacepost.bsky.social · 20/01/2025
Quantum learning models can exhibit the double descent phenomenon, challenging traditional statistical learning theory and highlighting their potential for improved performance in overparameterized regimes. arxiv.org/abs/2501.10077
arxiv.org
Double descent in quantum machine learning
The double descent phenomenon challenges traditional statistical learning theory by revealing scenarios where larger models do not necessarily lead to reduced performance on unseen data. While this co...
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Elies Gil-Fuster @eliesgf.bsky.social · 20/01/2025
📝 New work out today! Our next installment on the quest for modern learning theory in Quantum Machine Learning #QML: "Double Descent in QML" scirate.com/arxiv/2501.1...
title, author list, and abstract of the arxiv preprint https://arxiv.org/abs/2501.10077
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Elies Gil-Fuster @eliesgf.bsky.social · 05/01/2025
For a typical opera or orchestra concert that gets performed more than once, which is larger: A) the time spent clapping times the size of the audience. B) the time spent rehearsing times the size of the company / orchestra. What if we add "rehearsing and performing" to option 2? #showerthoughts
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Gergely Neu @neu-rips.bsky.social · 21/12/2024
*PLS SHARE* Open position for an *Associate Professor* in Machine Learning at our department (@enginyeria-upf.bsky.social / @upf.edu), via the Serra Hunter programme. DEADLINE: January 13th 2025 www.upf.edu/web/personal...
upf.edu
Professor Agregat Serra Húnter. Departament d'Enginyeria
Convocatòria 2024-30 PDI Serra Húnter Obert Convocatòria 2024-30 Adscripció: Department: Enginyeria Profile: Machine Learning Termini de sol·licituds: 13/01/2025 Data de publicació a la web:...
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Elies Gil-Fuster @eliesgf.bsky.social · 20/12/2024
New work out today 📝 Very insightful collaboration with colleagues from Fraunhofer HHI and the great @jenseisert.bsky.social. We offer a preview of explainable AI #xAI for #Quantum learning models #QML ⚛️🧠. Check it out and let us know your thoughts!
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Elies Gil-Fuster @eliesgf.bsky.social · 12/12/2024
Is there a particular reason why authors of published #ML papers don't update the doi on arxiv? I usually find a comment "paper published in XYZ", but right underneath it rads "cite as: arXiv:XYZ". This is not true for papers in quant-ph, for example.
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Elies Gil-Fuster @eliesgf.bsky.social · 09/12/2024
My most successful party trick is still to reveal that I'm actually Spanish and my whole family is Spanish.
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