Gotta love this guy. Who buys a new shirt and doesn't iron it before talk. Very cool.😊

Been using this to go to sleep, never get past the first 10 minutes!

I quite enjoy Nima's insight. For those who are interested in some of his work he is featured in a documentary about the Higgs on Netflix called Particle Fever.

Both of his parents are physicists from Iran.🙂🙂🙂🙂🙂

As a graduate student in theoretical physics, I have always had little patience with string theory and its holography and multiverses, as often heard from the pop sci literature. This lecture finally convinced me that multiverses and holography are at least conceptually valid, perhaps even desirable, options to consider.

Idiotic comments. Great Lecture.......

Thank you for that wonderful introduction....... and I’m lost..... I love it thanks Nima!!!!

Great video, he's my second favorite lecturer, Lenny Susskind is the first. I wish I could understand Witten but I guess everybody says that

I can't get over his brand new shirt.

Nima is thinned down and healthy now.

I realize this is from 9 years ago, but I don't understand why the CC can't be 20 orders of magnitude smaller than the critical value that allows anything to exist (23:00).

I'm reading rn Sean Carroll's "Something Deeply Hidden" book and so, managed to get Nima's very articulate presentation. It's obvious this guy is not only eloquent, he seems to have a firm grip of the subject. Obviously, many questions are unknown due to the cosmological horizon impeding observing vestiges of a multi-verse but, that point was well explained. I also liked the infinite apparatus vs finite limit to what is observable at the miniscule scale before a black-hole is created part, plus the notion space-time is doomed (or emergent) used to title a lot of these talks. This lecture/synopsis seemed more accessible than others I've seen. It would be nice if Nima could popularise more of his own work such as on the 1) Large Extra Dimensions and 2) the Amplituhedron scattering amplitudes work as these seem to be scientific theories of the large and small respectively, or put these talks' suggestions and tips for future theorists into popular written form as I reckon he's a talented speaker, no doubt, just would be nice for more popularising work, although, Sean Carroll does a good job at least so, that these talks are more comprehendable as a result! Cheers. 👍

41:04 bookmarking this part for future reference

Great talk!

"Infinite part that does the observing of the finite". Quantum Mechanics if taken seriously can make you spiritual 😁

Brilliant talk

Excellent.

The observable Universe has a beginning, its just not the beginning of everything. Our Universe belongs as a much larger structure, an infinite structure made out of an infinite number of other universes all belonging to what we will call the Omniverse whose nature is governed by the Aethoesystem. Each individual universe starts off as a magnetic singularity. This infinitely small singularity is then transfixed to the end of an umbilical cord tethered to the Aether by the Aethoesystem which then begins to pump the Aether into the singularity which then makes the singularity of magnetic force highly energized. After a time, depending on the singularity’s position in the Omniverse, both spatially and mathematically, the Aethoesystem would begin to transform the Aether into the fundamental particles that will be needed for the successful maturation of the Ovum along with the nuclear forces to assist in the particles processing. Once the particles begin to fill the singularity it simultaneously begins to expand. As the Aether transforms, fundamental particles begin to appear and fill the ovum which begins to grow in size as more and more particles enter, jockeying for room that just isn’t there and creating chaos as the particles continue to bang into each other, and if one is anti-matter and the other normal matter, they then destroy each other’s vibration, releasing the energy back to the Aether and creating quite a bang as a result. During this initial period, the magnetic field splits into two separate forces, the postromagnetic force and the electromagnetic force. The postromagnetic force then attracts the heavier anti-particles into the center of the ovum and the electromagnetic force attracts the lighter normal matter outward, around the center. This then continues until the ovum reaches a certain size, again depending on its designation in the omniverse, at which point the fields would reach their elasticity point and snap, releasing from the umbilical cord and causing the ovum to spin off into the Aethoesystem as the magnetic forces reverberate back and forth throughout the ovum, and once again creating absolute chaos. As this occurs, Gravity then takes holds and keeps it all together while each of the magnetic fields, already permeating throughout the ovum, are able to establish order and create a stable structure for the ovum to maturate and grow as it expands into the Aethoesystem to join all the other Universes in the Omniverse.

It's pleasant to have a philosophical review, thanks. Accepting that the reason to say that spacetime is doomed might be because the "spatial" terminology such as "vacua" applies only topologically, ie it applies to the stable effective result of cause-effect, ..the Quantum Fields Mechanism of temporal superposition, (the apparently material substance of time-duration), that can be calculated as projecting & modulating time-inflation states, is a "nameless" principle of mathematical multiplicity. (Implying the conjectured structure of quantized reality postulated by the calculation of discrete identies in infinity) It's the "virtual reality" of potential +&- relative temporal position at 1-0D. In timespace, "vacua" applies to conduction, the "empty space" of frictionless, crystaline field harmonics, ..time only transition or "jump space". If the Planck dimension is an evolved state within the anthropic conditions of a complete Universe, then the observable universe is the Quantum "containment field" of evolving and re-evolving life cycles from seed to adult in sub contextual environments of corporeal bodies, by the quantum logic of this cause-event here-now. Spacetime => standard modeling, (suggested by the particular effects on a metastable field in a Wilson's Cloud Chamber), is the natural identification "nomenclature " of the Quantum Fields Mechanism, ie the apparent modulated-modules of quantized bubbles in a theoretical Quantum Chemistry equivalent to the BBT, in terms of phase-state. The LHC is operating on the same principle with more refinements. Timespace is Quantum, scalar properties of the unitary-function of connection. "Infinitely big" identifies the physical evidence of the extent duration-due to the effective connection of eternity in the reciprocal position to now, ie it's the orthogonal quantized scalar properties of the objective singularity with transverse-tangential displacement of relative possible probability, in temporal superposition terms, a mathematical nomenclature.

Fascinating! I for one will double take this one in.

I enjoyed this!

"Existence" equals the fundamental, general state of time, and the phrase "a solid state of existence" is the reference frame against which the increasingly complex fluid states of change are related by the physical laws. To follow the sequences of structure and change around the "circle of infinity" from the least information component of a point, the potential minimum quanta, by increasing stages of complexity to the ultimate inverse quality of the "hole" in which the point potentially exists relative to the whole, is an infinite combination of infinity describing the connection. Temporal superposition is the self-shaping statement of existence and mechanism by which shaping is constructed, and is modeled by suspended particles in an echo chamber. It should exibit a blackbody spectrum but the cloud is collected by resonance. (always wanted to watch a Wilson's Cloud Chamber in action, and have now done so) Astronomy is in the actual cloud chamber to watch, and "it's fun to imagine", with the "echo" idea, why there's only one electron zapping in and out of the infinite possible positions available while remaining forever entangled, and so on. The more resilient shapes of resonance will be due to the relative persistence of prime numbers, and that is why the Polar/Cartesian coordinate connection is the dominant shape of resonance inside the sphere of higher dimensions, and why superconductivity applies near the extremes of shape and motion, or it's also interpreted as infinitely fluid-distributed eternity at the infinitly limited position, now. The possible arrangements of primes in complex conglomerations of connection that can then be associated with the constants is, as the Professor has demonstrated, difficult to calculate. ----- Probability "chips will fall where they will", means that like, "Gold is where you find it", is WYSIWYG Actuality, in which ONE-INFINITY prime-connection coordination is discovered set in absolute superimposed Temporal "solidity of No-thing ", of Zero-infinity Black-body Kelvin flat-space ground-state envelope sites, in fractal Eternity-now Interval, Cosmological placement.

Another interesting lecture.

What is the problem with having a literal infinite universe?

"I am not scared of Einstein!" haha, that was funny.

jeez that was easy to follow!

Really enjoyed this.....brilliant

The multiverse of string theory is very big, perhaps the biggest. Cf, Kilgore Trout

Was there any Q&A on this?

Thank you Nima for this extremely spellbinding account of 'multiverse and fine tuning' and for finding room for the anthropic principle (however cautiously). However, I would like to think how phase transition affects non-life matter to turn into life and consciousness (due to self-organizing and self-simulating property of matter), that I am tempted to assume similar self-simulation of a universal intelligent consciousness observer collapsing the QF into particles, just as in the double slit experiment of QM, fine tuning the parameter space to create life and human consciousness, with perfection and with probability one. Then man and god could be entangled. And divine purpose will be meaningful. The infinite (or zillions) of solutions to the string theory are like the zillions of different snow flakes, no two are similar, may not imply multiverse with different laws and values for CC and may imply laws of physics are the same everywhere (my limited knowledge says).

Arkani-Harmed: 'So here's why the anthropic principle isn't really a problem. We have experimental evidence up the yinger and the math checks out.' Bostrom: **shit, i just wasted an entire lecture, if not a bunch of my professional life**

What was the name of the song in the beginning? Who is the artist?

i think we can safely leave gods out of fine tuning, if a mind created the universe it had the laws of physics already in place and had to follow those laws, a god-creator could set all the numbers to "1" and we would accept that as natural. the thought that a guy with a beard was going "right, that's gravity sorted, oh frig, expansion, now what numbers will work" is a bit silly.

درود به نیمای عزیز من به فیزیک و فضا خیلی علاقه دارم ولی زبان انگلیسیم خیلی ضعیف است کاش فارسی بلد بودی برای ماهم صحبت میکردید. یاحداقل زیرنویس فارسی میگذاشتید.سلامتی ترا آرزو دارم.

Audio out of sync 03:38 Is there a corrected version of this video?

i found out how universe works.

This guy is knowledge in fun (unless it's the contrary: fun in knowledge?) Anyway, one keeps bumping against him when one is a bit interested in the adventure

43:00

Is theoretical physics now becoming like modern art. In the case physics most people can visualize space-time as determinist, wheras the majority of people cannot visualize non deterministic outcomes.

"Only when you've been contradicted by experiment ..." www.weizmann.ac.il/particle/milgrom/ Mordehai (Moti) Milgrom, Department of Particle Physics and Astrophysics, Weizmann Institute

He’s so intelligent, humans as him, r in their own 🌎 world, he lost me soon as he started talking😂😂😂😂😂😂😂😁 this dudes insanely smart lol

This is an invitation to see a theory on the nature of time! In this theory we have an emergent uncertain future continuously coming into existence relative to the spontaneous absorption and emission of photon energy. Within such a process the wave particle duality of light and matter in the form of electrons is forming a blank canvas that we can interact with forming the possible into the actual! The future is unfolding with each photon electron coupling or dipole moment relative to the atoms of the periodic table and the wavelength of the electromagnetic spectrum. As part of a universal process of energy exchange that forms the ever changing world of our everyday life the ‘past’ has gone forever. At the smallest scale of this process the ‘past’ is represented by anti-matter annihilation with the symmetry between matter and anti-matter representing the symmetry between the future and the past as the future unfolds photon by photon. In such a theory the mathematics of quantum mechanics represents the physics of ‘time’ with the classical physics of Newton representing processes over a period of time, as in Newton’s differential equations. In my videos I explain how this process is relative to temperature and the phase changes of matter.

So thats - the-the first part of 'v what I wanna talk about of-of the review is-is what-what the multiverse is...

The nature of nothing is like a dice still floating in the air.

Why does Nima Arkani-Ahmed blink so hard all the time?

Wonderful lecturer, But trim the hair.

He seems entirely unaware of just how fragmented is his narrative flow.

Considering the fine-tuned universe as a compelling argument or that there is "something more" to our reality doesn't or wouldn't necessitate being or becoming religious lol.. Nima has a MASSIVE bias toward quantum mechanics (even though he doesn't specialize in the field) and thinks that most experiments conducted in quantum physics are somehow all flawed (double-slit experiment, quantum entanglement, retrocausality, etc) and are uninteresting.

There’s no infinity... but some beings are going to make it to the end and start. I mean... it depended on your evolution.

By the way, "multiverse" conjecture doesn't deserve to be in the same sentence as Space-time and quantum mechanics. Space-time is a concept that has been accepted for over a hundred years and quantum mechanics is applied science now. Multiverse conjecture was invented to counter the anthropic principle/fine-tuned universe theory out of desperation. These guys have been literally "fine-tuning" counterarguments to the "apparent" fine-tuned universe "problem" for a century.

"Due to another delicate accident "

Isn't reality a bitch! LOL

hahahaha, you guys are so clearly, utterly lost, this is hilarious to watch

Time is a solved problem! arxiv.org/abs/1606.04759

Poor guy thinks he still has a head-full of hair :(

This guy has some serious problems!