John Martinis: The Nobel Physicist Behind Macroscopic Quantum Tunneling

John Martinis won the 2025 Nobel Prize in Physics for proving macroscopic quantum tunneling is real. Less than a year later he’s telling why he left Google’s quantum computing team to start over. Subscribe if you want the physics and the politics of building the impossible. Martinis is the co-founder of Colab and one of the physicists who proved ordinary quantum rules apply to macroscopic systems. He built his career on the same Josephson-junction hardware his Nobel is built on, then led Google’s superconducting-qubit effort, the same team behind Google’s 2019 quantum supremacy claim, before an internal reorg pushed him out. We go into Anthony Leggett’s challenge to Schrödinger’s cat, what decoherence in quantum mechanics really means, and whether quantum computing is the first technology ever born from pure theory rather than experiment. We also cover the internal Google reorg that pushed Martinis out and what he learned about building something new inside a large institution. Whether quantum mechanics applies to the macroscopic world and what it took to prove it Why Martinis thinks quantum computing may be the first technology born from pure theory, not experiment What negative authority means and why it matters for anyone building something new inside a large institution Whether the US can win the quantum computing race against China How Martinis thinks about quantum mechanics interpretations after spending a career inside the math “Always be on the lookout for the impossible, right?” John Martinis CHAPTERS 00:00  The Nobel call that almost wasn't 01:01  How his wife found out before he did 03:32  Anthony Leggett's challenge to Schrödinger's cat 05:53  Why a Josephson junction, not a quantum dot or trapped ion 07:45  Quantized oscillations: the “smoking gun” and Balmer's ghost 08:18  Measuring the system: the resonance experiment 11:21  Systematic effects: what separates a good scientist from a lucky one 13:42  The Ed Ohm story: the man who found the CMB and doubted it 15:01  Wigner's “unreasonably effective” math and the weirdest thing about QM 16:54  The transistor myth: chewing gum, coat hangers, and germanium 17:34  Microwave engineering meets quantum mechanics 19:26  Decoherence: the friction you can't live without 24:06  The heretical claim: does theory ever precede technology? 28:22  The “paper qubit” problem 29:34  What quantum computers are actually good for 32:27  Should quantum computing be regulated like AI? 33:35  US vs. China: the quantum computing race 35:44  Collapse, Copenhagen, or many worlds? Martinis's answer 37:43  Leaving Google: “essentially demoted” 40:48  Why Colab exists and what “negative authority” means 42:50  The real bottleneck: funding, not physics 43:31  Final advice: always be on the lookout for the impossible Qolab: https://qolab.ai/ Get the transcript, fascinating bonus content, and my Monday M.A.G.I.C. Message: https://briankeating.com/yt Have a .edu email and live in the USA? You automatically win a meteorite: https://BrianKeating.com/edu Subscribe: https://www.youtube.com/DrBrianKeating?sub_confirmation=1 Support Into the Impossible on Patreon, get my weekly M.A.G.I.C. Message, unfiltered bonus content, and live monthly Office Hours with me: https://www.patreon.com/drbriankeating Join this channel for perks, monthly Office Hours, and your name in the Member Roster at the end of every episode: https://www.youtube.com/channel/UCmXH_moPhfkqCk6S3b9RWuw/join My books: Losing the Nobel Prize (memoir): http://amzn.to/2sa5UpA Think Like a Nobel Prize Winner: https://a.co/d/03ezQFu Focus Like a Nobel Prize Winner: https://a.co/d/hi50U9U Galileo's Dialogue (first-ever audiobook): https://a.co/d/iZPi9Un Twitter/X: https://x.com/BrianKeating Substack: https://briankeating.substack.com Blog: https://briankeating.com/blog Audio-only: https://briankeating.com/podcast Landing page: https://awake-mill-k25t.here.now #intotheimpossible #briankeating #JohnMartinis #NobelPrize #quantumcomputing #physics #podcast Learn more about your ad choices. Visit megaphone.fm/adchoices