String Theory, Quantum Gravity and Black Holes (Or, Are We Holograms?)

Join Brian Greene and Juan Maldacena as they explore a wealth of developments connecting black holes, string theory, quantum gravity, quantum entanglement, wormholes, and the holographic principle.

This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation.

SHARE YOUR THOUGHTS on this program through a short survey:

00:00 - Introduction
02:40 - Welcome Juan Maldacena
06:40 - How does Einstein want us to think about gravity?
16:00 - Entanglement and quantum mechanics
23:47 - How does string theory fit into quantum mechanics?
30:48 - The mathematics of extra dimensions
38:07 - Predicting what universes are of higher measure
45:07 - The Entropy of black holes
53:36 - Does string theory shed light on foundations of quantum theory?
01:03:06 - What do you think about loop quantum gravity?
01:13:33 - Einstein's and ER = EPR
01:21:40 - Is quantum mechanics where you thought it would be today?

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[rdotthakidd]

Hey I’m a 20 year old kid who never had the money for school but I teach my self about these theory’s and I love to watch you alot Mr. Briangreen

[Starlite]

Just gotta say this: something I really like about Brian Greene is that even though he has opinions on the topic his interview subject is discussing and could easily BE the one being interviewed at any moment, he carefully doesn't interrupted his guests and lets them say what they have to say in their own way. As obvious as it is that doing so is literally the POINT of interviewing guests, almost NO ONE who does it seems to be able to get out of the way. The great Terry Gross of course is the absolute master of interviewing and Brian Greene is just like her in this respect. Thanks Brian.

[mmmao]

It’s great when both the interviewers and interviewees know their shit extremely well

[tehdebil]

Great discussion, Brian, you're an excellent interviewer asking the right questions in the right way that allows us laypeople to enjoy the interaction without dumbing it down too much

[dkndthy]

Maldacena is brilliant, and Brian adeptly accesses his wisdom.

[rwitmer]

Fun to watch Brian squirm/reach a bit. I like Juan's attitude: He's like, "Whatever."

I love how modest and diplomatic they are when discussing these concepts.

[Blackbird]

I'll watch it again-I feel compelled to try to understand some of this stuff but it makes my head hurt like nothing else I've ever encountered!

Brian Greene is a RockStar!

[hochathanfire]

Thanks Brian for not shying away from the nuance involved with the field 😤😎.

[hibou-cool]

Trying to learn through this amazing content! This is a hobby for me, I don’t expect to become an expert, but it’s so fascinating. I truly appreciate people like Brian Green that are socializing sciences, and feel grateful to have access to this library of content. I cannot believe how much fascinating it would be for someone that put the effort to learn the mathematics… maybe someday! Thank you

[PlanetXMysteries-pjnm]

"Your videos always leave me in awe and eager to learn more about the mysteries of the universe. Thank you for fueling my curiosity.
"

[MoshkitaTheCat]

Can’t get enough of this episode. Two brilliant minds.

[onioni]

Dear professor Greene, how does a string maintain the same vibration indefinitely without becoming a different string?

What determine how it will vibrate?

[Eye_Exist]

Question: what evidence we have for everything breaking down into 1-dimensional strings? and what evidence do we have for extra dimensions?

if we have none, then what validity does string theories have?

[naim]

I think it is fair to say that the smaller we go, the more complex the Universe is, and this phenomenon is relative across the board. I would suggest that the puzzle is infinitely long. If String Theory is the only mathematically possible explanation, these idea's should be pushed to exhaustion, or until someone develops a radicaly better theory. As it stands the scientific explanations are incomplete, and unsatisfactory, which leaves more space in the human mind to seek for alternatives.There is a balance and a breaking point but we're not there yet, therefore this cannot be deemed as unproductive time spent. Keep up the good work!

[steliosp]

Thank you for the stream/video Brian. Have a great weekend!

[sergeyyatskevitch]

Less interruption would do nicely. This way Dr. Maldacena, would have a better chance to present his thoughts.

[iiexffw]

This video is LOVED by Physics students from St. Finian's College Secondary School Mullingar Co. Westmeath Ireland

[KroumAntov]

Thank you for this video discussion and your position. We need to continue to push the frontier of knowledge further.

[johnkechagais]

The limit of information within a surface is that of an event horizon for a black hole. the holographic principle would rely on there being a limit of mass that can be within a specified volume before it collapses to a black hole. The curvature limit of space aligns with the information basis of QM.

[hochathanfire]

Juan kept it simple, and to the point. I appreciate that 🔥😊.