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Bruno Giménez Umbert

@gimenezumbert

Theoretical physicist and postdoc at the University of Southampton. I love physics

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26.11.2024
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Latest posts by Bruno Giménez Umbert @gimenezumbert

“I wish it need not have happened in my time,” said Frodo.

“lmao" said Gandalf, “well it has.”

01.07.2024 16:44 👍 2799 🔁 921 💬 9 📌 44

Gathering the world's most insecure and neurotic people, telling them that 1 in 3 of them can have a job doing what they love, and whether you are in that blesséd third depends on whether you have an ill defined underlying property of merit. Then giving them all Twitter accounts.

18.02.2026 06:50 👍 47 🔁 5 💬 2 📌 0
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GPT-5.2 derives a new result in theoretical physics A new preprint shows GPT-5.2 proposing a new formula for a gluon amplitude, later formally proved and verified by OpenAI and academic collaborators.

Chapeau to Kevin, Alex, Alfredo, David, and Andy on a beautiful dialogue between theoretical physicists and LLMs. openai.com/index/new-re...

14.02.2026 06:12 👍 4 🔁 1 💬 0 📌 0

Tell me about it

13.02.2026 13:50 👍 1 🔁 0 💬 0 📌 0
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05.02.2026 10:26 👍 0 🔁 0 💬 0 📌 0
A black and white photo of Chien-Shiung Wu standing behind the beam line of her apparatus. She is wearing a white lab coat and smiling at the camera.

A black and white photo of Chien-Shiung Wu standing behind the beam line of her apparatus. She is wearing a white lab coat and smiling at the camera.

Chien-Shiung Wu, who obtained experimental proof of parity violation in weak nuclear decay, was born #OTD in 1912.

Her 1956 experiment involving the decay of Cobalt-60 confirmed that the weak interaction does not respect what many had assumed was a fundamental symmetry of nature. 🧪 👩‍🔬 ⚛️

31.05.2025 14:36 👍 141 🔁 33 💬 3 📌 2

Science rules.

🔥🚨BREAKING NEWS: Spanish Scientists Have Officially Cured Pancreatic Cancer in Rats. This is groundbreaking.

29.01.2026 01:26 👍 21 🔁 3 💬 0 📌 2

Progress in fundamental physics is often slow. The Oxford Calculators understood the motion of objects whose velocity changes at a constant rate back in 1335, yet it took centuries for Galileo to recover and further develop these insights.

Patience! Enjoy the slow unfolding of mysteries.

27.01.2026 17:33 👍 33 🔁 1 💬 4 📌 0
Special Address by Mark Carney, Prime Minister of Canada | World Economic Forum Annual Meeting 2026
Special Address by Mark Carney, Prime Minister of Canada | World Economic Forum Annual Meeting 2026 YouTube video by World Economic Forum

Canada Prime Minster Mark Carney’s full Davos speech:

23.01.2026 07:30 👍 303 🔁 73 💬 7 📌 3
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The Carney doctrine Open comment thread on the PM's Davos speech

Mark Carney's speech really is terrific: full text is here and very much worth your time.

20.01.2026 17:52 👍 1977 🔁 686 💬 74 📌 174

I guess the fact that people can confuse narcissism with self-confidence, and self-confidence with competence (they are of course not the same), plays a role

20.01.2026 16:58 👍 1 🔁 0 💬 0 📌 0

It's true there were a few tight offsides that disfavoured Racing, but I think in general the referees were ok (although I am a Barça supporter so I probably have a biased view on this). But I loved how Racing fought and they could have perfectly won. I hope they come back to Primera

16.01.2026 08:19 👍 1 🔁 0 💬 0 📌 0

It was an amazing game!

16.01.2026 08:02 👍 1 🔁 0 💬 1 📌 0

Absolutely true.

15.01.2026 17:16 👍 2 🔁 0 💬 0 📌 0

One of my favorite movies! Did you like it?

15.01.2026 08:25 👍 1 🔁 0 💬 1 📌 0
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What a leader looks like.

Macron hits the right notes again.

14.01.2026 10:29 👍 199 🔁 61 💬 12 📌 4
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Can a single mathematical edxpression capture the whole spectrum of shapes that can exist? An attempt towards the "super formula" was made in this paper by Johan Gielis, revealing a novel and powerful way to study universal natural forms & phenomena. @manlius.bsky.social @jordipinero.bsky.social

11.01.2026 13:10 👍 23 🔁 4 💬 0 📌 1
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Why does life explore so few of the forms it could possibly take? Using fractal descriptors, this #scienceadvances paper shows that Earth’s biosphere clusters around simple shapes, reflecting deep evolutionary constraints. @artemyte.bsky.social @manlius.bsky.social www.science.org/doi/pdf/10.1...

11.01.2026 13:22 👍 229 🔁 76 💬 5 📌 6

Unfortunately, it pretty much works this way... But I would still encourage researchers to follow their nose and work on what they personally find most interesting, at their own risk. To me it still feels like the best approach

11.01.2026 07:59 👍 1 🔁 0 💬 0 📌 0
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Mujer blanca muere, por Carlos Zanón Estamos mirando el mundo con anticipada nostalgia. Como que lo que vemos ya no está y nos acordamos de aquellas películas sobre el verano antes de la guerra, cualquiera

www.lavanguardia.com/opinion/2026...

09.01.2026 17:28 👍 0 🔁 0 💬 0 📌 0

Cogratulations!

09.01.2026 14:41 👍 0 🔁 0 💬 0 📌 0
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Hollywood even made an apocalyptic movie called Greenland, not sure how appealing this is to them tho... ;)

09.01.2026 10:56 👍 4 🔁 0 💬 0 📌 0

It would definitely be a huge loss for hep-th to lose a researcher like you. I am sure you will find a way to bring and use your talent and knowledge where you are more valued, while enjoying it

08.01.2026 11:44 👍 2 🔁 0 💬 0 📌 0
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08.01.2026 10:37 👍 1 🔁 0 💬 0 📌 0

It’s not about drugs. If it was, Trump wouldn’t have pardoned one of the largest narco traffickers in the world last month.

It’s about oil and regime change.

And they need a trial now to pretend that it isn’t. Especially to distract from his sinking under Epstein and skyrocketing healthcare costs.

03.01.2026 15:34 👍 31695 🔁 8429 💬 1202 📌 382
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Are bacterial spores some kind of travelling neurons? In this @science.org paper the authors show that B. subtilis spores can integrate environmental signals over time and remember transient nutrient pulses. @koseskalab.bsky.social @drmichaellevin.bsky.social www.kaitokikuchi.com/assets/pdf/K...

27.12.2025 13:29 👍 31 🔁 7 💬 2 📌 0

Our history has taught us that there is no freedom of speech without freedom of information. And freedom of information exists where there is respect for pluralism.

There will be no freedom of speech if citizens' freedom of information is sacrificed to defend some tech oligarchs.

08.12.2025 12:52 👍 192 🔁 63 💬 3 📌 4

Immaturity masquerading as strength is the defining personal characteristic of our age.

07.12.2025 16:59 👍 142 🔁 27 💬 8 📌 1

To my knowledge, theoretical physicists in general are extremely skeptical about the possible relevance that quantum effects can play on consciousness, with only a very small subset taking the idea seriously. I had no idea this line of thought was actually influential...

21.11.2025 22:41 👍 2 🔁 0 💬 2 📌 0

I wasn't aware of the reference, thanks so much!!

21.11.2025 18:39 👍 1 🔁 0 💬 1 📌 0