Can Information Escape a Black Hole?
The Joy of Why
Steven Strogatz, Janna Levin and Quanta Magazine
4.9 • 577 Ratings
🗓️ 11 April 2024
⏱️ 29 minutes
🧾️ Download transcript
Summary
Nothing escapes a black hole… or does it? In the 1970s, Stephen Hawking described a subtle process by which black holes can “evaporate,” with some particles evading gravitational oblivion. This phenomenon, now dubbed “Hawking radiation,” seems inherently at odds with general relativity, but it gets weirder still: If particles can escape, do they preserve some information about the matter that was obliterated? Leonard Susskind, a physicist at Stanford University, found himself at odds with Hawking when it came to answering this question. In this episode, co-host Janna Levin speaks with Susskind about the “black hole war” that ensued and the powerful scientific lessons that have radiated from one of the most famous paradoxes in physics.
Transcript
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| 0:00.0 | starkly depicted as inescapable voids. |
| 0:05.0 | Black holes have terrorized the popular imagination. |
| 0:10.0 | Anything and everything that falls into a black hole is lost forever. |
| 0:15.0 | Or so the story goes, according to Einstein's general theory of relativity. |
| 0:20.0 | This defining character of black holes came under scrutiny. according to Einstein's general theory of relativity. |
| 0:23.6 | This defining character of black holes came under scrutiny in the 1970s |
| 0:26.7 | with a surprising challenge posed by a young and brilliant |
| 0:30.6 | but ailing British physicist, Stephen Hawking. |
| 0:34.8 | Hawking realized that through a remarkable and subtle quantum process, |
| 0:40.0 | black holes could evaporate, eventually exploding entirely in a burst of radiation. |
| 0:46.7 | Even in this explosion, nothing can escape. |
| 0:50.6 | The black hole seemed to take everything it had consumed with it into oblivion, including |
| 0:56.2 | all quantum information. But where did it all go? I'm Jan 11, and this is the joy of why, a podcast |
| 1:05.6 | from Quantum Magazine, where my co-host, Steve Strogetz, and I take turns exploring some of the biggest |
| 1:13.6 | unanswered questions in math and science today. |
| 1:17.6 | Few understood the significance of Hawking's results initially, but one scientist immediately |
| 1:24.6 | recognized the crisis that would become known as the information loss |
| 1:29.5 | paradox. He is here with us today, the famed physicist Leonard Suskind, Lenny to anyone who |
| 1:36.7 | knows him. In today's episode, Lenny leads us through the Black Hole War as we ask, |
| 1:42.6 | is there a quantum escape hatch from black |
| 1:46.2 | holes? And will we ever know for sure? Lenny is a professor at Stanford University and the |
| 1:52.7 | founding director of the Stanford Institute for Theoretical Physics. He's widely regarded as |
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