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Theories of Everything with Curt Jaimungal

Renato Renner: Quantum Mechanics Contains Its Own Contradictions

Theories of Everything with Curt Jaimungal

Curt Jaimungal

Physics, Philosophy, Society & Culture, Science

4.6606 Ratings

🗓️ 30 March 2026

⏱️ 206 minutes

🧾️ Download transcript

Summary

I personally subscribe to The Economist. TOE listeners get 35% off the annual subscription. No other podcast has this! https://economist.com/TOE Renato Renner (ETH Zurich) proves quantum mechanics contains logical contradictions that undermine its foundations.Quantum theory may be the most successful theory in history — and Renato Renner has proved it can't consistently describe itself. This is not a philosophical objection. It's a theorem. From there it spirals into black holes, reference frames, and why some of his students refused to continue working on the subject. This one is a quiet storm, blending the foundations of physics with something uncomfortably personal: the question of what you are. TIMESTAMPS: - 00:00:00 - Quantum Theory's Internal Contradiction - 00:05:51 - Recursive Consistency Checks - 00:11:00 - Wigner’s Friend Paradox - 00:18:11 - Global vs. Local Inconsistency - 00:25:04 - The Inhabitant’s Perspective - 00:31:12 - Modeling Multi-Agent Reasoning - 00:44:25 - Three Fundamental Assumptions - 00:56:36 - Quantum Reference Frames - 01:06:14 - Black Hole Information Paradox - 01:15:06 - Operationalizing Hawking Radiation - 01:24:48 - Realizability of Thought Experiments - 01:41:16 - Emotional Physics: Many Worlds - 01:50:03 - The Limits of Probability - 02:01:06 - Operationalizing the Measurement Problem - 02:15:41 - Generalized Probabilistic Theories - 02:29:16 - Quantum-Gravity Correspondence - 02:40:10 - The Source of Disagreement - 02:56:54 - Physics as Communication LINKS MENTIONED: - Renato's Papers: https://scholar.google.com/citations?user=OEBtlWgAAAAJ - Renato's Lecture at Helgoland [Lecture]: https://youtu.be/NxIyldEZzZI - Against Probability [Paper]: https://arxiv.org/abs/2601.18872 - Testing Quantum Theory with Thought Experiments [Paper]: https://arxiv.org/abs/2106.05314 - Quantum Advantage in Cryptography [Paper]: https://arxiv.org/abs/2206.04078 - Quantum Theory Cannot Consistently Describe the Use of Itself [Paper]: https://arxiv.org/abs/1604.07422 - Security of Quantum Key Distribution [Paper]: https://arxiv.org/abs/quant-ph/0512258 - Thought Experiments in a Quantum Computer [Paper]: https://arxiv.org/abs/2209.06236 - The Black Hole Information Puzzle [Paper]: https://arxiv.org/abs/2110.14653 - Quanundrum Software: https://github.com/jangnur/Quanundrum - Wigner's Friend: https://en.wikipedia.org/wiki/Wigner's_friend - Reimagining of Schrödinger's Cat [Article]: https://www.scientificamerican.com/article/reimagining-of-schroedingers-cat-breaks-quantum-mechanics-mdash-and-stumps-physicists1/ - Collapse Theory [Paper]: http://www.psiquadrat.de/downloads/grw86.pdf - Entropy of Hawking Radiation [Paper]: https://arxiv.org/abs/2006.06872 - QBism [Paper]: https://arxiv.org/abs/1003.5209 - Respecting One's Fellow [Paper]: https://arxiv.org/abs/2008.03572 - Why Do Humans Reason? [Paper]: https://www.dan.sperber.fr/wp-content/uploads/2009/10/MercierSperberWhydohumansreason.pdf - Quantum Mechanical Rules for Observed Observers [Paper]: https://www.nature.com/articles/s41467-024-47170-2 - Game Theory [Book]: https://amazon.com/dp/0262061414?tag=toe08-20 - Tim Maudlin [TOE]: https://youtu.be/fU1bs5o3nss - Jacob Barandes [TOE]: https://youtu.be/gEK4-XtMwro - Sean Carroll [TOE]: https://youtu.be/9AoRxtYZrZo - David Wallace [TOE]: https://youtu.be/4MjNuJK5RzM - David Bessis [TOE]: https://youtu.be/GHGi_XDqKNw More links at https://curtjaimungal.substack.com Guests do not pay to appear. #science 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

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It really troubles me that there is this problem, this contradiction. I had some students who said,

1:20.8

for psychological reasons, not be able to work on such projects. It would disturb them too much.

1:28.3

Most physicists apply quantum theory and never turn it on themselves.

1:33.3

It turns out there are scenarios where quantum mechanics leads you to contradictions when applied to quantum observers.

1:41.3

You're absolutely certain its heads. I see its tails.

1:45.0

That's Professor Renato Renner of E.T.H. Zurich telling me that it turns out one of these

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