Welcome to Theories of Everything's "Rethinking the Foundations of the Physics: What is Unification?" series featuring Jonathan Oppenheim.

Jonathan Oppenheim is a renowned theoretical physicist and professor at University College London (UCL), known for his groundbreaking research in quantum information theory, quantum gravity, and the relationship between quantum mechanics and thermodynamics. Jonathan holds a Ph.D. from the University of Cambridge and is recognized for his contributions to the fields of quantum foundations and quantum computation. https://www.ucl.ac.uk/oppenheim/

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LINKS MENTIONED:

- Sean Carroll on TOE: https://www.youtube.com/watch?v=9AoRxtYZrZo

- Jonathan's first appearance on TOE: https://www.youtube.com/watch?v=NKOd8imBa2s

- Jonathan's paper on hybrid classical-quantum dynamics: https://arxiv.org/pdf/2203.01332

- Jonathan's paper on a post-quantum theory of classical gravity: https://journals.aps.org/prx/pdf/10.1103/PhysRevX.13.041040

- Jonathan's website: https://www.ucl.ac.uk/oppenheim/

- List of all of Jonathan's published papers: https://arxiv.org/search/?query=Oppenheim%2C+Jonathan&searchtype=author&abstracts=show&order=-announced_date_first&size=50

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Timestamps:

00:00 - Intro

01:08 - Quantum Mechanics and Classical Mechanics

06:05 - Quantizing Gravity

10:30 - How Gravity is Different

16:07 - Classical-Quantum Gravity

21:42 - Quantum Mechanics

25:23 - Example of Continuous Master-Equation

28:45 - Observation Causes a Collapse

35:20 - Path Integrals

49:34 - Intuitions

59:32 - Is Spacetime Classical?

01:03:05 - Outro / Support TOE

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