For those who haven’t studied QFT/QED, it should be stated that the approach and techniques Dyson invented in this paper, “The S Matrix in Quantum Electrodynamics”, and the previous one, “The Radiation Theories of Tomonaga, Schwinger, and Feynman”, are still taught and used to this day. It is a beautiful way to construct the perturbation theory of a QFT.
I had a similar experience once. I was invited to a dinner party and just as I arrived I realized that I had forgotten to do my laundry. It was a Sunday night, so as you can imagine I was rather distracted throughout the dinner party.
When you listen to such great scientist talking about meeting E. Wigner, R. Feynman, Schwinger, E. Fermi and had a common work with the pakistani genius Muhammad Abdus Salam, you can just say "Wooow!" and enjoy the goose bumps on your skin. What an era of Science! Just unbelievable 👏💡❤️
Some of the criticisms below of S matrix theory are ill informed and silly-Dyson's contribution was very important and he was willing to be honest about his "failure" to complete the full theory-nevertheless his work on showing that the two approaches to QED were equivalent ( and much else besides!) guarantee his place in the higher firmament of theoretical physics. He was a genius and will always be infinitely more interesting than some of the mediocre people who comment about his achievements on youtube.
is there a way we can listen to these clips together, rather than clicking each time one finishes? I'd like to watch the whole thing. Do you have a "combo" version posted somewhere? Thanks....
1:52 I was about to wonder how the hell he could have been "there" with them after an insight like that, haha...at any rate, the kind of sudden insight where it's not due to some external stimuli recalling whatever one is working on...not the "Hollywood scientist kind of insight", is what I'm saying...
I doubt any real theorist took the S-matrix seriously and was a particularly bad piece of science. Who would have thought this guy was at the center of it? He was/is a mathematician.
@Stephen Turner Don't defer to authority without critical analysis. Dyson did a lot of great works in mathematical physics but his S Matrix paper is kinda obsolete now. It may have made him famous but it wasn't a particularly revolutionary bit of physics. Learn some real physics before posting stuff guys.
General Relativity is also a phenomenological theory, yet you don’t see people going around saying that it’s bad science… First of all the S-matrix as a concept is very natural, and I fail to see why you despise it so much, unless you despise all of quantum mechanics, which completely neglects almost all physics performed nowaydays. Oh, and if you want to say that General Relativity is different, you actually use an effective field theory as well as scattering amplitudes to solve problems in General Relativity… Guess which operator is very important for this, right, the S-matrix.
For those who haven’t studied QFT/QED, it should be stated that the approach and techniques Dyson invented in this paper, “The S Matrix in Quantum Electrodynamics”, and the previous one, “The Radiation Theories of Tomonaga, Schwinger, and Feynman”, are still taught and used to this day. It is a beautiful way to construct the perturbation theory of a QFT.
I had a similar experience once. I was invited to a dinner party and just as I arrived I realized that I had forgotten to do my laundry. It was a Sunday night, so as you can imagine I was rather distracted throughout the dinner party.
When you listen to such great scientist talking about meeting E. Wigner, R. Feynman, Schwinger, E. Fermi and had a common work with the pakistani genius Muhammad Abdus Salam, you can just say "Wooow!" and enjoy the goose bumps on your skin. What an era of Science! Just unbelievable 👏💡❤️
These physicists seem to belong to another species of human. I admire them greatly, but I find their mental powers almost frightening.
A grown man using emojis. Disgusting philistine.
@@RalphDratman How you feel about these guys is how these guys felt about John von Neumann.
@@qbtc That makes sense. Also Dyson seemed to feel that way about Feynman.
Some of the criticisms below of S matrix theory are ill informed and silly-Dyson's contribution was very important and he was willing to be honest about his "failure" to complete the full theory-nevertheless his work on showing that the two approaches to QED were equivalent ( and much else besides!) guarantee his place in the higher firmament of theoretical physics. He was a genius and will always be infinitely more interesting than some of the mediocre people who comment about his achievements on youtube.
is there a way we can listen to these clips together, rather than clicking each time one finishes? I'd like to watch the whole thing. Do you have a "combo" version posted somewhere? Thanks....
The channel has a playlist that will autoplay.
Freeman Dyson, brilliant, as always.
Love Dyson🎉
Once, I felt wat he described...
00:53 Is he talking about Eugene Wigner?
Yes.
It says lComments: 1. Was it removed! I am now “2”.
i remember this from highschool 📝
Another aha-moment, I guess, haha...
1:52 I was about to wonder how the hell he could have been "there" with them after an insight like that, haha...at any rate, the kind of sudden insight where it's not due to some external stimuli recalling whatever one is working on...not the "Hollywood scientist kind of insight", is what I'm saying...
I doubt any real theorist took the S-matrix seriously and was a particularly bad piece of science. Who would have thought this guy was at the center of it? He was/is a mathematician.
John Sebring Nobody takes your mum seriously.
@Stephen Turner Don't defer to authority without critical analysis. Dyson did a lot of great works in mathematical physics but his S Matrix paper is kinda obsolete now. It may have made him famous but it wasn't a particularly revolutionary bit of physics.
Learn some real physics before posting stuff guys.
And yet he’s contributed so much more to science and human knowledge then you ever will... geniuses are human and capable of making mistakes.
What are u all talking about. He made a legit point. S matrix theoey is only superficial or phenomenologically acceptable at its best
General Relativity is also a phenomenological theory, yet you don’t see people going around saying that it’s bad science… First of all the S-matrix as a concept is very natural, and I fail to see why you despise it so much, unless you despise all of quantum mechanics, which completely neglects almost all physics performed nowaydays.
Oh, and if you want to say that General Relativity is different, you actually use an effective field theory as well as scattering amplitudes to solve problems in General Relativity… Guess which operator is very important for this, right, the S-matrix.