If you watch his lectures on 1.5x they're actually pretty good
@lakhan71793 жыл бұрын
👌👍
@meghamanihaldar6483 жыл бұрын
Hey.... i do this🤭🤭... sir is awesome
@meetghelani52226 ай бұрын
Oh yes, doing the same.
@not_amanullahАй бұрын
2x
@helloby41255 ай бұрын
Watching this after Watching bender's lectures gives you the feeling of standing on the shoulders of giants
@meghamanihaldar6483 жыл бұрын
Sir it's my humble request to make videos on the course of relativistic quantum mechanics..... your lecture is awesome sir..just awesome .....its my request to mit.... it'll help a lot
@shivammishra66243 жыл бұрын
Yeah same , needed that one
@not_amanullahАй бұрын
Thanks 🤍❤️
@cngrinder94234 жыл бұрын
Can someone please explain me why he gets these results when doing bra(0) (a+a dagger)^4 ket(k) or ket(0)? I don't understand it
@MrFuncti0n4 жыл бұрын
for bra(0)(a+a dagger)^4 ket(0), expand out (a+a dagger)^4, noting that a and a dagger do not commute. Then, apply this expansion to the state ket(0) -- you will find only the contributions a*adagger*a*a dagger and a^2*a dagger^2 put between bra(0) and ket(0) will give a nonzero result, as the other terms will either annihilate the ground state or be orthogonal (e.g., bra(0)ket(2) = 0). Similar considerations apply to other matrix elements.
@prabhatp6542 жыл бұрын
Why this argument of asymptomatic expansion is justifiable? If it's an infinite sum, it says that for any value of lambda, your ground state energy will be infinite? Doesn't it mean that the assumptions (of series expansion) you took, in the beginning, are false? What is happening?
@JohnVKaravitis4 жыл бұрын
1:30 Then the dotted line s/b inside the parabola. 17:20 Please close your parenthesis.
@Cienciasexy3 жыл бұрын
Not for x
@cikif5 жыл бұрын
13:41 he says "the bra"
@bonnome25 жыл бұрын
What is your point? He is talking about the bra + operators he underlined on the previous board.
@cikif5 жыл бұрын
so that whoever is in charge of adding subtitles can fix it
@c8adec5 жыл бұрын
He actually says "the bruh", a physics term
@Skumar-rg4hd3 жыл бұрын
Yes it is clearly "bra" came from bracket
@DragonWarrior15243 жыл бұрын
No it's Cali dialect for "the brah", like his homies
@bonnome25 жыл бұрын
Could you please make an better title? It can be really unclear from the title what the previous lecture is.
@ankykolo65265 жыл бұрын
The worst lecture I have ever seen. Congratulations MIT !. This guy isn't even teaching, he is just talking to himself. LOOOOL
@bonnome25 жыл бұрын
Some forms of lecturing are better for some than others. Most people find him pretty good.
@danielgeorge74665 жыл бұрын
You're kidding, right?
@lobisw5 жыл бұрын
I learnt plenty from this, so it can't be that bad. Plus I've been to some shocking lectures. So it must at least be decent.
@isaacwesterback91274 жыл бұрын
ahh yess he should def be having an open class discussion for QM with undergrads im sure they would learn wayyy more lmao /s
@dsanjoy4 жыл бұрын
It's lecture 2.2 of QM-III and he is trying to demonstrate how to use the perturbation technique to approximately solve an unsolvable problem. What did you expect? Some pop-science s**t ?