PBS Space Time PBS Space Time

What Transpires To Quantum Information Inside A Black Hole?

Oct 30, 2026 · 22m

Summary

This episode explores the black hole information paradox by analyzing the conflicting observations of Alice, who falls into a supermassive black hole, and Bob, who monitors the event horizon from a distance. The narrative highlights the tension between the equivalence principle, which suggests Alice passes through the horizon uneventfully, and quantum mechanics, which dictates that information cannot be destroyed or cloned.

Topics discussed

Sponsors: LinkedIn, Gatorade, and Merch Intro Alice and Bob: Black Holes, Holography, and Entanglement The Role of Quantum Entanglement in Spacetime Setting the Scene: Alice's Descent into Sagittarius A* Bob's Perspective: Time Dilation and Freezing at the Horizon Sponsors: LinkedIn, Gatorade, and Checkout.com Bob's View: Pancakification and Loss of Sight Hawking Radiation and Bob's Dyson Sphere Plan Alice's Perspective: Equivalence Principle and Freefall Alice Crosses the Horizon: No Weirdness Observed Sponsors: LinkedIn, Gatorade, and Checkout.com Alice's Fate: The Singularity and Quantum Bit Capture Bob's Long Wait: Black Hole Evaporation and CMB Recovering Information: Patterns in Hawking Radiation Reconstructing Alice: Digital Ghosts in a Dead Universe The Contradiction: Where Is the Qubit? No-Cloning Theorem and Unitarity in Quantum Mechanics Sponsors: LinkedIn, Gatorade, and Checkout.com The Paradox: Breaking Unitarity or Equivalence Principle Outro: Upcoming Topics and Limited Edition Merch
Listen ad-free on Castria