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The Quantum Frontier with Brian Greene and John Preskill

2025-08-08 Science & Technology
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Quantum Computing: Foundations, Scaling Challenges, and Gravitational Links

Explore how the probabilistic nature and inescapable entanglement of quantum mechanics enable computational power far beyond classical limits, and discover how these insights are now resolving long-standing mysteries about spacetime and black holes.

Short Summary

  • Quantum computation achieves power by leveraging the exponential complexity of describing highly entangled quantum systems, which overwhelms classical memory capacities.
  • Realizing useful quantum computing requires Quantum Error Correction (QEC) to bridge the gap between noisy physical qubits (error $\approx 1/1,000$) and reliable logical qubits (target error $\approx 1/1,000,000,000,000$).
  • Discovering the necessary mathematical structures for QEC and information scrambling has provided unexpected, powerful tools for studying quantum gravity and spacetime geometry.

This conversation with physicist John Preskill navigates the core concepts of quantum mechanics, assesses the current state and future hurdles of building quantum computers, and traces the profound, cross-disciplinary impact of quantum information science on fundamental physics like cosmology and black hole thermodynamics.

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Description

Renowned Caltech physicist John Preskill joins Brian Greene for an in-depth discussion of quantum mechanics, focusing on where we are and where we're headed with quantum computing. This program is part of the Big Ideas series, supported by the John Templeton Foundation. Participant: John Preskill Moderator: Brian Greene 0:00:00 - Introduction 0:01:33 - Are There Still Quantum Mysteries? 0:03:32 - Three Pillars of Quantum Mechanics 0:05:25 - Einstein and Quantum Entanglement 0:14:51 - Quantum Weirdness and Relativity 0:17:46 - The Measurement Problem 0:28:29 - Intro to Quantum Computing 0:40:28 - Why Preskill Switched Fields 1:00:51 - What is Quantum Error Correction? 1:15:30 - Quantum Supremacy 1:23:07 - Can Quantum Systems Impact Society? 1:27:19 - The Black Hole Diary Thought Experiment 1:31:14 - The Black Hole Bet with Stephen Hawking 1:38:44 - What We Still Don’t Understand About Black Holes 1:41:03 - From Baseball Cards to Quantum Physics 1:45:12 - Credits VISIT our Website: http://www.worldsciencefestival.com FOLLOW us on Social Media: Facebook: / worldsciencefestival Twitter: / worldscifest Instagram: https://www.instagram.com/worldscifest/ TikTok: https://www.tiktok.com/@worldscifest LinkedIn: https://www.linkedin.com/company/world-science-festival #worldsciencefestival #briangreene #cosmology #astrophysics

Top Comments (10)

@mikefischbein3230 2025-08-10

Brian Greene's interviews are consistently outstanding.

52 4 replies
@suyapajimenez516 2025-08-09

This is the kind of conversation I can go on for a long time with two honest, very well prepared people. A conversation where you can learn and understand the topic of the day. Thank you

28
@thomascaldwell184 2025-08-09

Hearing about the frontiers of science from those exploring them is just fantastic. And Dr. Greene is very good at hosting the discussion. This and PBS Spacetime may be my favorite channels.

25 5 replies
@zelmoziggy 2025-08-09

One of the most enjoyable conversations I can recall.

22
@AzharAli-n5c 2025-08-09

Great 👍👍👍❤❤❤ conversation

10
@cassieray6461 2025-08-09

Love love love these conversations. It brings substance and structure to such profound topics to the masses and still allows humans (highly intelligent ones) to be, in their own sense, trapped in a quantum state. Thanks for all you and your teams hard work!

8
@juniorcyans2025 2025-08-16

I stopped at 23:31 for now. It took me more than 23 minutes to finish, as I paused often to get some information from GPT. It’s a blessing to live in this era, everyone can be so close to the knowledge they’d like to explore!

2
@-tarificpromo-7196 2025-08-09

Brian’s backdrop tells more stories than the entire shelf of books🥀

1
@paulthegaull 2026-04-21

Simply brilliant. thank you very much mr Preskill, mr Greene and WSF

0
@tevatronlhc244 2025-11-12

"to teach a class is the best thing to learn something". I love this statement from John 😊

0

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