I am extremely pleased to share this paper I wrote with Jean Alexandre and Silvia Pla. In a few words: The dynamics of any reasonable cosmic inflation model need to account for the RG evolution of the inflation potential! A thread below 🧵👇 arxiv.org/abs/2511.05296

Today, I published this paper on recent CMB observations vs Lyman-alpha constraints on the primordial power spectrum, and how it favours inflation potential with localised features. A thread!🧵👇

That's the terror of knowing what this world is about Watchin' some good friends screamin', "Let me out" Pray tomorrow gets me higher Pressure on people, people on streets! #nokings

First time I had to review an AI-generated article. This is going to get harder and harder.

Unconverged MCMC corner plots are psychedelic. I think I will eventually open an art gallery. #cosmology #art #science

After an intense week of organising two different conferences, now flying to Munich to relax and chat physics... and opening a little gem on the way!! Very comprehensive textbook! Strongly recommend it!

Yesterday, we hosted @kingsnmes.bsky.social King's College London the first edition of the UK-APP conference series, a new platform for discussion in astroparticle physics phenomenology funded by the IoP. The winter edition of the conference will be hosted by Manchester University, stay tuned!

First day of the #Nehop 2025 conference in Brussels, a lot of fun to come!

After a few weeks off social media I open Bluesky hoping to read lots of new exciting research initiatives, but the most I read about is how visa fees in the UK and the Trump admin in the US are endangering past initiatives. Truly depressing.

This plane company deeply cares about what their customers read. No crappy magazines allowed 😄

Can somebody explain to me what the heck is the usefulness of referencing a "private communication" in a paper? Really sounds to me like "I used some secret scientific fact that some famous person told me about, so you've got to believe it, and sorry but you can't check it, it's private" 😕

Looking forward to this! Thanks @danclery.bsky.social for the nice interview! Modest telescope with big plans, SPHEREx will probe cosmic ‘inflation’ after Big Bang www.science.org/content/arti... #cosmology #inflation #SPHEREx 🧪⚛️

The NSF budget reduced by two thirds. Incredible. Public funding of research in the US will die if people don't react quickly. www.science.org/content/arti...

It is starting. The US government idea of limiting to 15% indirect costs of research taken on research grants leads some universities to stop hiring PhD students. This has to stop very quickly. It won't unless the American people protests or strikes as a whole. www.wesa.fm/health-scien...

Based outside the UK and interested in a postdoc at King's College London in numerical GR/cosmology? Contact Eugene @tukohbin.bsky.social!

Unexpected epochs of stillness that punctuate the cosmic timeline could offer a natural explanation for dark matter and many other unsolved astronomical mysteries.

In space, no-one can hear you scream – is it on pause?⏸️ In @newscientist.com, @lucienheurtier.bsky.social shares how the history of the cosmos could be defined by stillness, potentially turning the universe's history on it’s head🌌 https://buff.ly/4aVmg7o #Physics #Astronomy

In 2020, I discovered with my US collaborators a new paradigm for #cosmology and #particle #physics that we named "Cosmic Stasis". We then published several works investigating the many implications of such a discovery. This was featured this week in the New Scientist! Article by Miriam Frankel.🧪

UK-APP is born! 🧪 This new conference series dedicated to astroparticle physics phenomenology will take place for its first edition at King's Collefe London @kingsnmes.bsky.social on June 2nd 2025! Put it on your calendar and register! indico.global/event/13955/...

Primordial Black Hole Hot Spots and Nucleosynthesis. Clelia Altomonte et. al. https://arxiv.org/abs/2501.05531

It's paper day! With my great collaborators C. Altomonte @cleliaaltomonte.bsky.social & M. Fairbairn @malcfairbairn.bsky.social, we explored how the formation of hot spots around Primordial Black Holes affect Big-Bang Nucleosynthesis constraints on their abundance. Thread 🧵👇 arxiv.org/abs/2501.05531

My windshield this morning. Nature is beautiful ❤️

When Amazon reminds me to do a Raclette this winter 🧀😂

This past year was full of happiness but also challenges. This new one promises to have its load of challenges too. People: "Happy new year!" Me: [Deep breath] "Ok let's go!" 💪 #nevergiveup

This means a lot to me. Support is the thing I believe is the most essential in a student's journey, and I feel so blessed that the support I provide to my peers had a positive impact at KCL @kingsnmes.bsky.social Thanks to all the students who nominated me 🙏 www.kcl.ac.uk/news/kings-s...

Our very own David Marsh (King's College London) gives a great overview of axion phenomenology at the Annual Theory Meeting #DurhamUniversity #ATM2024 @kingsnmes.bsky.social

Physicists lack of money, but they have principles. 🎄 @kingsnmes.bsky.social 🧪⚛️

What the heck is this??

A question for the #Cosmo community 🌌🧪: Does anyone know of any reference regarding models of inflation with equation of state parameters -1<w<-1/3 that are significantly away from the de Sitter limit? Any observational obstruction?

Never thought my research could make people anxious 😰

Interesting piece of work on light Primordial Black Holes by Holst, Krnjaic, and Xiao, on the clustering and merging of light PBHs to form heavier PBHs in cosmology. The phenomenology of light PBHs is now a thing, stay tuned! arxiv.org/abs/2412.01890

I try to force myself every time 😅

Three PhD positions in theoretical physics 🧪⚛️ are open at the TPPC in King's College London with three excellent supervisors!

Nominations for IOP Medals and Prizes are open! From outstanding early-career stage physicists to individuals who have made world-leading contributions in the field. If you or someone you know is doing brilliant work, go and submit your nominations! iop.org/awards #IOPAwards25

I found my Christmas calendar! 📆🎄🍫

Got my paper copy! ☺️ @newscientist.bsky.social Great article on the front page, featuring my work, but also interviewing great experts like Ruth Gregory, Katy Clough, Ian Moss, @artturajantie.bsky.social, & John Ellis on the metastability of the Higgs boson and it's consequences for our Universe!

Tomorrow, our guest at LAWPHYSICS will be Jack Shergold (IFIC Valencia), who will talk about the cosmic neutrino background. Join us! Wednesday, November 27, 15:00 UTC (9:00 am Chicago). www.youtube.com/watch?v=8_5H...

I'm new to this, but I just created a list dedicated to Primordial Black Hole physics! bsky.app/profile/did:...

It’s the end of the world as we know it – maybe?🌎 In this week’s @newscientist.bsky.social cover story Prof John Ellis, Prof Ruth Gregory and @lucienheurtier.bsky.social discuss the potential death of the universe and why it's helping scientists come up with better physics. 📷 📷 loom.ly/Qz-eGU8

Hello blue sky! Just arrived in here and realising how much I missed already! 🤗