# The Birth of the Qubit - Inside the 2025 Physics Nobel Prize-Winning Discovery

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Text version: https://stenobird.com/podcast/quantum-physics-for-kids-6713249/the-birth-of-the-qubit-inside-the-2025-physics-nobel-prize-winning-discovery.md
Podcast: [Quantum Physics for Kids](https://stenobird.com/podcast/quantum-physics-for-kids-6713249)
Published: 2025-12-25T21:22:53+00:00
Episode link: https://podcasters.spotify.com/pod/show/tanvigopalan/episodes/The-Birth-of-the-Qubit---Inside-the-2025-Physics-Nobel-Prize-Winning-Discovery-e3cqgjq
Audio file: https://anchor.fm/s/e9887004/podcast/play/113115194/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2025-11-25%2F415001498-44100-2-5aea06d8872d4.mp3
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Duration seconds: 432

## Resource

This episode explores the 2025 Nobel Prize-winning discovery that quantum mechanics extends beyond atoms into the macroscopic world. It details how researchers proved that electrical circuits can exhibit quantum tunneling and energy quantization.

## Highlights
- Main idea: The discovery of macroscopic quantum tunneling (MQT) proves quantum rules apply to visible matter, not just subatomic particles
- Technical mechanism: Researchers used Josephson junctions and Cooper pairs at near-absolute zero to isolate quantum effects from thermal energy
- The 'Smoking Gun' test: By removing all heat energy, scientists proved particles could still escape barriers via tunneling rather than thermal hopping
- Discovery of energy quantization: Experiments showed electrical circuits absorb microwave energy only at specific, discrete frequencies
- Practical takeaway: These breakthroughs in MQT and energy quantization are the fundamental building blocks for creating functional qubits

## Topics

Quantum Physics, Nobel Prize in Physics, Macroscopic Quantum Tunneling, Quantum Computing, Qubits, Josephson Junction, Energy Quantization, Superconductivity

## Chapters
- 0:00 — The 2025 Nobel Prize Discovery: An introduction to the groundbreaking work of John Clarke, Michel Devoret, and John M. Martinis regarding macroscopic quantum phenomena.
- 1:00 — Cooper Pairs and Josephson Junctions: Explaining how particles clump together at absolute zero and how physical barriers attempt to trap them.
- 2:00 — Classical vs. Quantum Tunneling: A comparison between particles using heat to hop over barriers versus using quantum tunneling to pass through them.
- 3:00 — The Smoking Gun Test: How scientists used extreme cooling to eliminate thermal energy, proving that particle escape was purely a quantum event.
- 5:00 — Energy Quantization in Circuits: Using microwave frequencies to demonstrate that electrical circuits absorb energy in discrete, quantized packets.
- 6:00 — The Foundation of Qubits: Connecting these physical discoveries to the practical existence and development of quantum computing technology.

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## Transcript

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