Felix Finster: How Dirac's 90-Year-Old Error Unifies All of Physics

Theories of Everything with Curt Jaimungal

Curt Jaimungal

Physics, Philosophy, Society & Culture, Science

4.6 • 606 Ratings

🗓️ 29 July 2025

⏱️ 129 minutes

🔗️ Recording | iTunes | RSS

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Summary

Felix Finster proposes causal fermion systems unify physics by building spacetime from quantum correlations. The conversation covers the Dirac sea, emergence of geometry, the Born rule, and implications for quantum gravity and cosmology.0:00 Introduction3:12 The Origins of Causal Fermion Systems6:55 Engaging with Alternative Theories in Physics15:22 The Standard View of Causation18:21 Classical, Quantum, and Pre-Quantum23:06 How Spacetime Emerges from Disconnected Points29:49 Recovering Lorentz Signature Without Assumptions31:48 Recovering the Born Rule from First Principles39:39 The Measurement Problem46:20 Bounds on CSL Parameters49:45 The Dynamics of Spacetime57:47 Collaboration with Yao and Reflections on the Theory1:03:13 A Quantum Gravity Theory Without Supersymmetry1:05:28 The Dirac Sea1:11:40 Addressing Infinite Energy in Semi-Classical Gravity1:13:09 Octonions in the Vacuum Structure1:17:32 Chirality and the Action Principle1:20:33 Baryogenesis and Why Matter Exists1:35:10 Rethinking the Strong CP and Hierarchy Problems1:38:43 Recognition, Collaboration, and Growing Attention1:54:00 Mathematical Criteria vs. Experimental Tests2:01:02 Advice for Young ResearchersRESOURCES:- Felix's Papers: https://scholar.google.com/citations?user=F7ppNroAAAAJ- Felix's Bio: https://www.uni-regensburg.de/mathematik/mathematik-1/startseite/index.html- Causal Fermion Systems [Paper]: https://arxiv.org/pdf/2405.19254- Linear Dynamics of Wave Functions [Paper]: https://arxiv.org/pdf/2101.08673- The Principle of the Fermionic Projector [Book]: https://www.amazon.com/Principle-Fermionic-Projector-Advanced-Mathematics/dp/0821839748- Baryogensis for Causal Fermion Systems [Paper]: https://arxiv.org/pdf/2111.05556- Holographic Mixing [Paper]: https://arxiv.org/pdf/2410.18045- Standard Model Physics from an Algebra? [Paper]: https://arxiv.org/pdf/1611.09182- Barry Loewer & Eddy Chen [TOE]: https://youtu.be/xZnafO__IZ0- Fay Dowker [TOE]: https://youtu.be/PgYHEPCLVas- String Theory Iceberg [TOE]: https://youtu.be/X4PdPnQuwjY- David Kaiser [TOE]: https://youtu.be/_yebLXsIdwo- Ruth Kastner [TOE]: https://youtu.be/-BsHh3_vCMQ- Amanda Gefter [TOE]: https://youtu.be/yABPvDJ6Zgs- Jacob Barandes [TOE]: https://youtu.be/7oWip00iXbo- Eva Miranda [TOE]: https://youtu.be/6XyMepn-AZo- Emily Adlam [TOE]: https://youtu.be/6I2OhmVWLMs- Scott Aaronson & Jacob Barandes [TOE]: https://youtu.be/5rbC3XZr9-c- The Economist discount: I personally subscribe to The Economist. TOE listeners get 35% off the annual subscription. No other podcast has this! https://economist.com/TOE- Join My New Substack (Personal Writings): https://curtjaimungal.substack.com- Listen on Spotify: https://open.spotify.com/show/4gL14b92xAErofYQA7bU4e- Become a YouTube Member (Early Access Videos): https://www.youtube.com/channel/UCdWIQh9DGG6uhJk8eyIFl1w/join- Support on Patreon: https://patreon.com/curtjaimungal- Support on Crypto: https://commerce.coinbase.com/checkout/de803625-87d3-4300-ab6d-85d4258834a9- Support on PayPal: https://www.paypal.com/donate?hosted_button_id=XUBHNMFXUX5S4- Twitter: https://twitter.com/TOEwithCurt- Discord Invite: https://discord.com/invite/kBcnfNVwqs Theories of Everything with Curt Jaimungal features long-form, technically detailed interviews with leading researchers in physics, mathematics, consciousness, and philosophy, exploring topics at the level of active research. For academics, graduate students, and anyone seeking depth beyond popular science. Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0	I was no longer happy because I understood what was going on, but I didn't have the feeling
0:05.5	that what we did was really describing nature.
0:07.9	It seemed somewhat artificial.
0:09.8	Then there's the issue that it's not clear what quantum gravity actually is.
0:15.1	Professor Felix Finster has spent over 30 years rethinking the fundamental units of physics.
0:21.6	His theory, causal fermion systems, begins with a concept from Dirac that negative energy
0:26.9	states aren't these mathematical artifacts we thought they were, but instead form an actual
0:31.8	real sea underlying reality.
0:35.1	From this foundation, Finster constructs space-time as correlations between
0:39.5	wave functions spread across discrete points. There's no pre-existing geometry. There's no assumed
0:45.8	metric. There's just abstract operators and a variational principle. Interestingly, from this austere
0:52.2	beginning, you actually get general relativity and the standard
0:56.0	model emerging. What's more, there are three generations, correct gauge groups, matter versus
1:01.9	antimatter asymmetry, which is why you're here today to watch this, the measurement problem
1:06.4	collapses, and even chirality breaking is predicted. A true candidate for a theory of everything. My name's
1:13.2	Kurt J. Mungle, and on this channel, I investigate theories of everything, or of reality, with rigor,
1:19.8	using my background in mathematical physics. Today's conversation demonstrates how mathematical
1:24.3	precision and physical insight can rebuild your understanding of nature.
1:30.6	A special thank you to our advertising sponsor, The Economist.
1:35.1	I thought the Economist was just something CEOs read to stay up to date on world trends,
1:39.3	and that's true, but that's not only true.
1:42.1	What I found more than useful is their coverage of math,
	...

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