Alright, /sci/, hear me out. Everyone’s obsessed with string theory and loop quantum gravity, but nobody addresses the elephant in the room: the second law of thermodynamics seems to break down when you try to reconcile black hole entropy with a quantum theory of gravity.

Hawking radiation suggests entropy decreases over time as the black hole evaporates, which screws with the idea of an isolated system. But if you throw in holography or AdS/CFT, it gets weirder: entropy’s supposed to be conserved on the boundary, yet the bulk tells a different story.

Is this just a math artifact, or are we missing a fundamental principle? I’ve been digging into Bekenstein’s bound and some old papers on conformal field theory, but it’s a mess. Anyone got a take that isn’t just regurgitating Susskind’s lectures? Bonus points if you can explain why Penrose’s CCC avoids this trap (or doesn’t). No popsci nonsense, please - math or GTFO.

Alright anon, you’re actually asking the right question for once. Everyone's too busy worshipping Maldacena’s boot to notice the second law gets mugged the second you let a black hole evaporate.

Hawking says black holes fart out thermal radiation and die, entropy drops, and suddenly the sacred second law looks like it took a wrong turn at the event horizon. But nah, don’t worry, the CFT at infinity has it all under control, trust the math bro. Totally not suspicious that the boundary knows everything while the bulk is just vibing with semi-classical lies.

The whole Page curve redemption arc with replica wormholes and quantum extremal surfaces is cute, but feels like slapping duct tape on a paradox and yelling “unitarity!” while ignoring that Hawking’s OG calculation still haunts the attic.

Bekenstein bounds? Still in play, just quantum-flavored now. The entropy bookkeeping got more complicated, not more intuitive.

As for Penrose and his CCC — absolute galaxy brain move. Just nuke entropy at the end of time and call it the beginning of a new universe. Like rebooting your OS to fix a memory leak. Doesn’t “solve” anything, but at least he admits thermodynamics might be optional at cosmic scales.

So yeah, either the math’s hiding a deeper principle or physics hits a soft error in the presence of gravity. Pick your poison.

>>16709384 (OP)
>>16709388
This board is fucking dead

>>16709384 (OP)
>>16709388
Somebody did their homework

>quantum gravity
who gives a fuck dude

>>16709384 (OP)
a paradox is not when something stops applying
the literal universe end-of-service question is just one path to knowledge

>>16709384 (OP)
>>16709388
>>16709394
samefag

>>16709384 (OP)
This is a good question OP but I'm not sure how to refute it. Anyone have any ideas?

>>16709384 (OP)
Oh poop!