Complexity and Gravity II - Leonard Susskind

Prospects in Theoretical Physics 2018: From Qubits to Spacetime
Topic: Complexity and Gravity II
Speaker: Leonard Susskind
Date: July 26, 2018
For more video please visit video.ias.edu

[@alimibrahem8120]

all respect and love to prof Leonard susskind I hope to stay healthy and well..💕

[@silberlinie]

Leonard Susskind is on a really hot new thing.

[@ankidokolo]

The good old Lenny talks about the complexity of the thermodynamics of Gravity. Really enjoyed.

[@Bellenchia]

He truly has a sense of humor

[@relike868p]

Watching this in 2022 with those epidemic analogies becoming real epidemics

[@madeleinebirchfield7658]

There is a fundamental misinterpretation of spacetime, geometry, and gravity in general relativity: what physicists typically call 'curved spacetime' is more accurately a geometric representation of the strength of the relativistic gravitational field, as general relativity is a classical gauge theory. In quantum gravity, when they say that 'spacetime ought to be quantised or discrete', they really mean that the 'relativistic gravitational field ought to be quantised'. This already has a corresponding analogue in second quantisation and the development of quantum electrodynamics from classical electrodynamics, which also has a geometric interpretation (the dirac matrices could be thought of as unit vectors in a 3+1 dimensional geometric spacetime), but which does not mean that electric charges physically curve spacetime or caused spacetime to be quantised. The statement ER=EPR is more accurately stated as 'a wormhole is a geometric representation of entanglement between two particles'; this does not mean that wormholes actually exist in the real world, only that the strength and directions of the gravitational field is determined by the entanglement of the particles inside the field.

[@schmetterling4477]

Yes, even a student learning Einstein's equations notices that they look like thermodynamic equations. So what? People have been saying that for over half a century now with zero progress in actual physics.

[@zaphhood4745]

Thanks Lenny.

[@realcygnus]

cool stuff

[@TheMemesofDestruction]

22:00

[@brian554xx]

ER = EPR

[@wordysmithsonism8767]

Anyone know "g lads" definition?

[@luisfelipe7351]

if time can be mathmaticaly expressed as a function of mass as you oberve in a sandglass flow of the grains following gravity then it can also be understood as something multidimensional as masses and gravity is spread through out the universe in different positons in space , thus time

[@naimulhaq9626]

I had been waiting for a long time for this lecture, that not only talked about ADS/CFT correspondence by Maldacena, but also touched on the most important aspects of complexity, self-error correcting, infinite dimensional, algorithm unknown, self-simulating quantum computing function, leading to production of fine tuned particles/strings, creating life with perfection and with probability one. Proving QM is completely deterministic. Feynman would have loved to watch part 1 and 11. Part 1 started with a wave function, reminiscent of Hartle-Hawking no boundary universe theory.

[@Chiavaccio]

👏👏👏👏

[@dckeitshokile3390]

💪💪

[@davidwilkie9551]

Trancendental Meditation, correspondence and Geometrical Drawing and Perspective Projection. Wordless recognition required after the lectures.., "think for yourself".

[@brian554xx]

1:15:00

[@Aman-tf8bt]

why are we identifying the circuit with discrete time when all transformation that evolve with time are contionous?

[@allen2879]

This is a very basic presentation, are there any more in-depth studies?