Andy Strominger and Sean Carroll discuss the 40+ year journey from string theory to imaging the holographic horizon of M87

Sean Carroll’s Mindscape 222 Podcast (1/9/2023) with Andrew Strominger on Quantum Gravity and the Real World

https://youtu.be/STyVT21vVQg

The whole podcast is great and sets the context. But it you start at 1:13:18 Andy says just a bit later, “look at the numerical sim of the first LIGO merger and ask where is the holographic plate?” 


https://youtu.be/Zt8Z_uzG71o



That thin light gray ring around the black hole void is the Bekenstein-Hawking Bound of the M87 black hole image by the EHT in 2018-2019.
The schematic diagram of which I saw on the screen of John Wheeler’s Macintosh when I met with him in South Bristol in 1990.


 Photos of Andy Strominger and some of his presentation I took at World Science Festival 2019.
This slide gives good background for this part of his discussion with Sean.








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