Quantum at 100: From Thought Experiment to Trillion-Dollar Bet

One hundred years after Werner Heisenberg worked out quantum mechanics on a North Sea island, the theory he started is both the foundation of modern technology and the center of a high-stakes industrial race. This episode traces the full arc: the 1925 breakthrough, the quantum technology already inside your phone and your hospital, how superposition, entanglement, and tunneling actually work, and the 2024-2026 breakthrough cycle — Google's error-correction and verifiable-advantage results, IBM's fault-tolerance roadmap, Microsoft's contested topological bet, and the public fight over how close any of it really is. IN THIS EPISODE • Why 2025 became the International Year of Quantum — and what a billion dollars of 2025 revenue does and doesn't prove • From Heisenberg's hay fever to a 2025 Nobel Prize: the century-long path from theory to hardware • Superposition, entanglement, tunneling, decoherence, and error correction — the concepts, without the math • Google, IBM, and Microsoft's three very different bets, and the physicists publicly disputing one of them • The questions nobody can answer yet: utility, scaling, the money, and the security clock SOURCES • Physics World — "International Year of Quantum Science and Technology 2025: here's all you need to know" (2025) — https://physicsworld.com/a/international-year-of-quantum-science-and-technology-2025-heres-all-you-need-to-know/ • McKinsey & Company — "Quantum Technology Monitor 2026: A commercial tipping point" (April 2026) — https://www.mckinsey.com/capabilities/mckinsey-technology/our-insights/mckinsey-quantum-technology-monitor-2026-a-commercial-tipping-point • NobelPrize.org — "Press release: Nobel Prize in Physics 2025" (October 2025) — https://www.nobelprize.org/prizes/physics/2025/press-release/ • Berkeley News — "John Clarke, UC Berkeley emeritus professor, awarded 2025 Nobel Prize in Physics" (October 2025) — https://news.berkeley.edu/2025/10/07/john-clarke-uc-berkeley-emeritus-professor-awarded-2025-nobel-prize-in-physics/ • John Preskill — "Quantum Computing in the NISQ era and beyond" (2018) — https://arxiv.org/abs/1801.00862 • Google Quantum AI et al. — "Quantum error correction below the surface code threshold," Nature (December 2024) — https://www.nature.com/articles/s41586-024-08449-y • NIST — "NIST Releases First 3 Finalized Post-Quantum Encryption Standards" (August 2024) — https://www.nist.gov/news-events/news/2024/08/nist-releases-first-3-finalized-post-quantum-encryption-standards • The Quantum Insider — "Overview of 15+ Key Quantum Sensing Companies" (April 2026) — https://thequantuminsider.com/2026/04/10/overview-15-plus-key-quantum-companies-2026/ • Hartmut Neven, Google — "Meet Willow, our state-of-the-art quantum chip" (December 2024) — https://blog.google/technology/research/google-willow-quantum-chip/ • Google Research — "A verifiable quantum advantage" (October 2025) — https://research.google/blog/a-verifiable-quantum-advantage/ • IBM Newsroom — "IBM Sets the Course to Build World's First Large-Scale, Fault-Tolerant Quantum Computer" (June 2025) — https://newsroom.ibm.com/2025-06-10-IBM-Sets-the-Course-to-Build-Worlds-First-Large-Scale,-Fault-Tolerant-Quantum-Computer-at-New-IBM-Quantum-Data-Center • Physics World — "Experts weigh in on Microsoft's topological qubit claim" (2025) — https://physicsworld.com/a/experts-weigh-in-on-microsofts-topological-qubit-claim/ • Science News — "Microsoft's quantum chip got an upgrade. Critics are still skeptical" (June 2026) — https://www.sciencenews.org/article/microsoft-quantum-chip-upgrade-majorana • ITPro — "Jensen Huang changes his tune on quantum computing after January stock shock" (March 2025) — https://www.itpro.com/technology/jensen-huang-quantum-computing-backtrack