Quantum Gravity - Juan Maldacena

General Relativity at 100: Institute for Advanced Study and Princeton University Celebrate the Enduring Reach, Power and Mysteries of Einstein’s Theory
Juan Maldacena - November 6, 2015
www.ias.edu/gr100
Albert Einstein’s general theory of relativity, a pillar of modern physics formulated 100 years ago, will be celebrated by the Institute for Advanced Study and Princeton University in a two-day conference, General Relativity at 100. The conference, which will feature ten colloquium-style talks by international experts on diverse aspects of general relativity and its fascinating history-from cosmology to quantum gravity, from black holes to neutron stars-will take place in Wolfensohn Hall on the Institute’s campus on November 5-6. The conference will also celebrate the seminal role of Princeton physicists, particularly John Wheeler and Bob Dicke and their students, in advancing an examination of general relativity.
“The general theory of relativity is based on profound and elegant principles that connect the physics of motion and mass to the geometry of space and time,” stated Robbert Dijkgraaf, Director of the Institute and Leon Levy Professor. “With Einstein’s equations, even the universe itself became an object of study. Only now, after a century of calculations and observations, the full power of this theory has become visible, from black holes and gravitational lenses to the practical use of GPS devices.”
Einstein was one of the Institute’s first Faculty members, serving from 1933 until his death in 1955, and played a significant part in its early development. Einstein came to the United States to take up his appointment at the invitation of Abraham Flexner, the Institute’s Founding Director. Today, theorists at the Institute continue to interpret and test Einstein’s theory of general relativity, about which questions persist: What is the physics of black holes? Do space and time emerge from a more fundamental description? Why is the universe accelerating? How can general relativity be reconciled with quantum mechanics? What are the origins and the long-term fate of the universe?
The celebration will open on November 4 with a special performance of Light Falls: Space, Time, and an Obsession of Einstein, a dramatic portrayal of Einstein’s discovery of the general theory of relativity, at Princeton University’s Richardson Auditorium. Light Falls, written by Brian Greene, Member (1992-93) in the Institute’s School of Natural Sciences and Professor of Theoretical Physics at Columbia University, composed by Jeff Beal (“House of Cards”), designed by 59 Productions (“An American in Paris”) and directed by Scott Faris (“Walking with Dinosaurs”), is an original work weaving together dramatic portrayals, state-of-the-art animation and innovative projection techniques to trace Einstein’s electrifying journey toward one of the most beautiful ideas ever conceived.
The conference will close on November 6 with a recital for the Institute campus community by world-acclaimed violinist Joshua Bell and a screening of the new documentary Einstein’s Light by Nickolas Barris, Director’s Visitor (2013) at the Institute and founder of Imaginary Films. Einstein’s Light explores how scientific imagination and innovation advance knowledge, with Einstein and Dutch Nobel Laureate Hendrik Lorentz as models. The film examines Einstein’s discoveries as well as modern examples of scientific imagination and innovation, highlighting institutions such as the Institute and others around the world. Bruce Adolphe’s score reflects the power of music as a catalyst for Einstein’s scientific creativity and his deep connection to the music of Mozart and Bach. Joshua Bell’s performance at the Institute will mark the world premiere of the score set to the final visualization from the film.
Major support for the General Relativity at 100 conference and related events has been provided by Eric and Wendy Schmidt.
More videos on video.ias.edu

[@das_it_mane]

Gotta give Juan credit for taking risks and pushing the boundaries

[@sombh1971]

4:20 The energy in the rest frame of the observer is just his mass, given it's a point like observer. Why should that transform to the boost in Minkowski space, given by xH - tP? 5:21 Why exactly is a~1/r ? Because of centripetal acceleration? But that that only holds in Minkowski space, isn't it so? Whereas this isn't the case here at all, for it's a circle in a spacetime diagram, and the conventional notion of circular motion is lost on it. But maybe there are more concrete reasons, idk...

[@MrGOTAMA420]

he most cited man in physics! hes the best

[@MrGOTAMA420]

@@frankdimeglio8216 what your saying here gives credence to repulsive gravity as well (if i get you rou right) based on polarity . what do you thing of susskinds holographic principle ? and were can i locate your work?

[@MrGOTAMA420]

@@frankdimeglio8216 also, the light paradox were a beam going through glass will slow down by a third then speed up instantaneously as it exits the glass (not a prism)

[@abhinandanmehra7765]

@@frankdimeglio8216 I am truly enamoured by your esteemed knowledge I want to know.more about more worm holes space time continum and everything kindly provide your email id so that I can connect with you

[@Unidentifying]

excellent ^^ thank you so much

[@bernardonavarro3409]

My experiences when using my short writings is that only I can understand them and not one else. In quantum mechanics even Einstein was wrong interpreting the symbolism of such of procedure that he ask his colleague in Berlin to help him out, yet his theoretical theses were in writing look accurate but in symbolic system of quantum mechanics did not. How was that possible? When you are right you are and when wrong you might be correct (if you) and das the difference.

[@casteretpollux]

@@frankdimeglio8216 I'd always been told we don't know what gravity is. Thanks for the above. Is it generally accepted?

[@STohme]

Very very interesting talk. Many thanks.

[@albertgerard4639]

I like falling asleep this lectures. Bzzz.

[@albertgerard4639]

I like falling asleep this lectures. zzz.

[@davidwilkie9551]

If it follows from Einstein's theory of gravity that the mathematical methodology is the confirmation of the basic property of curvature in spacetime, then this is the appropriate sequence of factoring horizons in quantized strata to conform to the enclosure of a wave-package Quantum universe. (?) (I have not yet familiarized myself with the constituent assembly of mathematical components, a broad brush approach is too slow to keep up) _____ Fortunately, Professor Susskind's lectures and former students like Professor Maldecena are also following up on the same principle, by default. The "Inflation Gravitation" Temporal Superposition-singularity positioning of objectives in QM-TIMESPACE, -> Einstein's Mathematics, and is the description of what is possible in this context for a specific set of constants, it's reactive to WYSIWYG measurable phenomena, not proactive explanation. NB: Because the Quantum Operator => the Arrow of Time is the cause-effect of "Travel timing" not Time travel, and because the laws of Physics are symmetrical, they pivot on the Singularity of Eternity-now and e-Pi-i frequencies.., it's always Now, so the idea of a beginning of anything is an entirely "local" perception of here-now. As the child develops the ability to recognise discrete changes in the degrees of perceived information, the beginning realisation of a measurable difference has a beginning and end of attention, but the general context of eternity-now is the ultimate continuous connection condition. (Ie BBT etc, is due for re-vision)

[@casteretpollux]

Does this not mingle subjective and objective?

[@physicsphilosophy2492]

👍👍👍👏👏👏👏👏👏👏👏👏👏

[@jackmcmillan8854]

The cosmological constant is positive (small but positive still). This rules out the anti-De Sitter universe. So why are we still talking about ADS/CFT ?

[@AlexCoglin]

AdS/CFT isn't supposed to be a model of our universe, it's just supposed to help us understand black holes in AdS space (which will be similar to black holes in flat space), and to help us understand strongly-coupled QFTs (string theory is usually 'easier' than these theories as it's weakly coupled, so we prefer to compute in the bulk than at the boundary).

[@enlongchiou]

Strong force g(p)=g*(m/pm)^2=1.13*10^28 form a quantum black hole of proton pl=4.19*g(p)*pm/c^2, have quantum gravity curvature 8*3.14*g(p)*pm*me*137/128.5 equal to electrical attraction 2*ke^2.(g=6.674*10^-11,m=2.176*10^-8, pm=1.67*10^-27, pl=8.8*10^-16,c=299792458,me=9.109*10^-31 kg, k=8.987*10^10, e=1.6*10^-19)

[@kennethchow213]

Gravity is equivalent to electromagnetism because Mass(in kilograms)= Charge squared(in Coulombs squared)x10^-7 divided by distance between two charges in meters. You can find this simple relation in most standard books on electromagnetism(with some substitutions and mathematical techniques). So, quantum gravity is simply electromagnetism of the quanta.

[@naimulhaq9626]

I will stick with Sean Hartnoff's picture of a coating of superconducting charges acting as the stator of a motor when the rotor is made of the quark-gluon liquid, explaining the huge spin of the BH. Green claims that Ramanujan's mathematics predicts 194 types of BH. The mathematicians will have the last word.