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Nathaniel Craig @physicsnate.bsky.social · 13/03/2026

For my own part it was a chance to lay out a vision for how this might play out in particle theory, including the world premiere of the FERMIACC, my group's particle theory agent for collider data. www.youtube.com/watch?v=35mY...

youtube.com

Nathaniel Craig - Reasoning AIccelerators for High Energy Physics - IPAM at UCLA

YouTube video by Institute for Pure & Applied Mathematics (IPAM)

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Nathaniel Craig @physicsnate.bsky.social · 13/03/2026

Last week I had the tremendous pleasure of attending an IPAM workshop on AI in mathematics and physics. It seems clear that 2026 will be for theoretical physics what 2025 was for computer science.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

I didn't realize we were talking about existing LLM capabilities, or even just LLMs. My hope and expectation is that we can develop ML capabilities (agentic and otherwise) that accelerate transformative technologies. This takes work, distinct from promoting LLMs for QG.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

Decoupling means that many different microscopic theories look the same at fixed experimental precision. It's the whole reason we can do physics! It seems obvious that progress comes from increasing the experimental precision, although that doesn't sell nearly as well as quantum gravity prophecies.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

For example, there are slightly different compactifications of the same string theory that both give rise to the Standard Model particle content, but differ by the additional states at higher energies. Telling the difference requires experimental data.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

It is absolutely possible there is a single-parameter theory of everything that will be revealed via a complete theory of quantum gravity. But that seems increasingly remote. More likely, a complete framework for quantum gravity can still admit different low-energy particle theories.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

I have a lot of respect for Dan, and I’d entertain the quote if your essay were titled “Is Quantum Gravity Dead, Dying or Just Hard?” (arguably a better question!). But I thought we were talking about particle physics.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

I think we're bottlenecked at the development of transformative accelerator technologies. If you could significantly enhance the impact of every human accelerator physicist working on ionization cooling and plasma wakefield, it would bring those horizons much closer.

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Nathaniel Craig @physicsnate.bsky.social · 28/01/2026

The problem with Jared's inference, and other claims that AI will "solve" HEP, is that it misstates the problem: it's not that we lack a good theory for the data, it's that we have altogether too many theories compatible with the data we have. We need agentic accelerator physicists, not AI Nima.

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Nathaniel Craig @physicsnate.bsky.social · 18/12/2025

Everything but the tunnel already fits in the CERN budget over the relevant timescale, so the useful measuring stick is private/international contributions relative to the tunnel cost. By that measure this is fairly significant.

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Reposted by Nathaniel Craig

Zhongbo Kang @zhongbok.bsky.social · 21/11/2025

Huge thanks to Nathaniel Craig @physicsnate.bsky.social for a beautiful and truly inspiring colloquium at UCLA today! I also really enjoyed our discussions and lunch together 👏👏👏

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Nathaniel Craig @physicsnate.bsky.social · 11/08/2025

Just to echo @dangaristo.bsky.social, there are significant factual errors in this post. LEP3 (or any proposed Higgs factory) will produce fewer Higgs bosons than the LHC. And the Zh cross section doesn't peak at mh + mZ -- that's threshold.

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