Fundamental Physics in the Twenty-first Century | Nima Arkani-Hamed

Nima Arkani-Hamed, Professor, School of Natural Sciences, Institute for Advanced Study
www.ias.edu/people/faculty-and...
In this talk, Nima Arkani-Hamed, Professor in the School of Natural Sciences, discusses the direction of fundamental physics in coming years and decades, including efforts to replace the concept of spacetime and understand how the macroscopic world is formed by microscopic quantum mechanical laws. A key influence in the search for answers will be a new "golden age of experiments." The lecture was part of the Institute for Advanced Study's celebration of its eightieth anniversary in 2010.
More videos at video.ias.edu

[@Maxinator11-11]

Nimas handwriting and drawings are very appealing in their elegant simplicity. He is a real treasure.

[@davidselway651]

He is an incredibly clear presenter. I saw him in a talk given at ASU that covered some of the same ground but this stuff is so interesting that I do not mind repetition, which after all aids learning.

[@thirumalmurugesan2587]

If one doesn't explain it simple.. He doesn't understand well enough.. He really explained it well.. I grasped it to the most part.. Thanks

[@vincentstuart3148]

Excellent speaker helpful to the layperson to grasp physics

[@sparhopper]

If space and time are intertwined, it doesn't seem too strange that space increases as time increases.

[@Fransamsterdam]

And enough reason to search for Edward Witten once again. :-)

[@robertschlesinger1342]

Excellent overview of some aspects of the frontiers of particle physics, suitable for advanced high school and beginning college students. Some of Nima's papers may be downloaded from his website and from arXiv.org.

[@brendawilliams8062]

Thankyou for the excellence

[@CGMaat]

Penrose and Nima are unique physicist and child like artist !

[@wulphstein]

The big bang began as a single event of one graviton with energy E = hf = energy of the big bang; it evolved after that into a spherical universe. If the big bang did not evolve from a single event, then there is nothing to guarantee that it would evolve spherically.

[@DavidBrown-om8cv]

"What about emergent space-time?" My guess is that the preceding question cannot be satisfactorily answered without the realization that Milgrom is the Kepler of contemporary cosmology. arxiv.org/abs/1301.3907 Pavel Kroupa, Marcel Pawlowski, and Mordehai Milgrom. "The failures of the standard model of cosmology require a new paradigm." International Journal of Modern Physics D, Volume 21, Issue14, 2012, 1230003.

[@DavidBrown-om8cv]

arxiv.org/abs/1301.3907

[@brian554xx]

Please use scientific notation *or* a prefix, not both. (10^28 cm = 10^26 m)

[@ANGEL-eh6pd]

Thank you so much, I'm such a fan. You explain this information in such a coherant way for someone like me, a multiple intuitive cognition with ADHD. This is just an interest and hobby of mine, and I'm just so happy there's no need for me to visit the library any more. I'M STILL LEARNING. I see you must drive on extroverted intuition too, I can tell. Your MBTI = INTP or ENTP. Me an ENFP. Lol

[@deathtokoalas]

these exotic theories have their place, but we tend to figure out in the end that we're missing some fundamental point. in a sense, what the heisenberg principle is telling us is that we can't model space-time as static. but, don't we know that from sr? if it is true that the universe is expanding in all directions at a constant rate, it would in truth be obvious that there must be a minimum unit of space and time that can be measured, before it up and expands right in front of our faces. we talk about things like lorentz-invariance with such ease, so how is this not obvious? of course space-time doesn't exist, or at least not as a static map - it's in constant expansion. could we just be missing relativistic effects here and getting confused into seeing randomness?

[@deathtokoalas]

and, if space is expanding, shouldn't locality collapse where the expansion becomes observable?

[@deathtokoalas]

it might be useful to build a quantum field theor with the expansion of space as an axiom, rather than a deduction.

[@deathtokoalas]

don't ask me, i'm just a guitarist.

[@Trevorthentcy]

hey I like 2nd and 3rd person to watch this :-) I found this guy through closer to the truth with Dr. Robert Lawrence Kuhn This is good!!!!!! more and more the regular person can access this type of information.

[@enlongchiou]

Nature of vacuum energy(ch) will pack energy of pull string form a black hole by ch=(2*3.14*1.6*10^-35)(2.17*10^-8*(299792458)^2), 1.6*10^-35=6.67*10^-11*2.17*10^-8/c^2.

[@0tube0user]

when we find dark matter will we then find dark energy concurrently, or visa-versa ?

[@CGMaat]

NIMA HAS A NEW VISION ; EMERGENT SPACE

[@keningenious3576]

Any systemic information isn't lost, simply merged with quantum decoherence noise. Thus practically any systemic information gets lost if the system isn't degenerate and spatially confined, also time allows noise to accumulate. If someone dies here in Earth, we cannot revive him following each particle history, simply because that history is mixed with quantum noise. I repeat - time increases the noisy interactions. Noise can be statistically modelled, but never exactly. Thus information gets mixed with noise and practically lost to us. We theoretically know that quantum noise is fundamental and ubiquitous. We also know that we cannot predict accurately noise data, only their behaviour pattern. Believe me, if you want to revive the dead, you need the exact data, not a generic noise pattern modelling. If you cannot fundamentally revive the dead (even if you had the best future technology) then information can be mixed with quantum noise and practically lost.

[@Fransamsterdam]

Lot of new data. But nothing special, until now...

[@alijoueizadeh8477]

Space-time means events; matter in eternal motion. I am sure that we are going to leave this idealistic view of " the end of space-time" behind us.

[@piercingtheveil7749]

Have these physicists heard of Scaler Waves? That travel many times faster than the speed of light! 🤣🤦‍♂️