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/ SPONSOR (The Economist): As a listener of TOE, you can now enjoy full digital access to The Economist. Get a 20% off discount by visiting: https://www.economist.com/toe 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 TOE'S TOP LINKS: - Patreon: https://patreon.com/curtjaimungal (early access to ad-free audio episodes!) - Listen on Spotify: https://open.spotify.com/show/4gL14b92xAErofYQA7bU4e - Become a YouTube Member Here: https://www.youtube.com/channel/UCdWIQh9DGG6uhJk8eyIFl1w/join - Join TOEmail at https://www.curtjaimungal.org SPONSORS (check them out): - THE ECONOMIST: As a listener of TOE, you can now enjoy full digital access to The Economist. Get a 20% off discount by visiting: https://www.economist.com/toe - INDEED: Get your jobs more visibility at Get your jobs more visibility at https://indeed.com/theories ($75 credit to book your job visibility) - HELLOFRESH: For FREE breakfast for life go to https://www.HelloFresh.com/freetheoriesofeverything 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 Support TOE: - Patreon: https://patreon.com/curtjaimungal (early access to ad-free audio episodes!) - Crypto: https://tinyurl.com/cryptoTOE - PayPal: https://tinyurl.com/paypalTOE - TOE Merch: https://tinyurl.com/TOEmerch Follow TOE: - NEW Get my 'Top 10 TOEs' PDF + Weekly Personal Updates: https://www.curtjaimungal.org - Instagram: https://www.instagram.com/theoriesofeverythingpod - TikTok: https://www.tiktok.com/@theoriesofeverything_ - Twitter: https://twitter.com/TOEwithCurt - Discord Invite: https://discord.com/invite/kBcnfNVwqs - iTunes: https://podcasts.apple.com/ca/podcast/better-left-unsaid-with-curt-jaimungal/id1521758802 - Pandora: https://pdora.co/33b9lfP - Spotify: https://open.spotify.com/show/4gL14b92xAErofYQA7bU4e - Subreddit r/TheoriesOfEverything: https://reddit.com/r/theoriesofeverything Join this channel to get access to perks: https://www.youtube.com/channel/UCdWIQh9DGG6uhJk8eyIFl1w/join #science #physics #quantumphysics #gravity Learn more about your ad choices. Visit megaphone.fm/adchoices