It is now 2024... I already forgot how much difference you can feel between 480p and 720p. This video is much sharper than the previous one.
@user-rg1nt9lf4s6 жыл бұрын
very good content sir. thank you .. sir kindly make a video on Bound States for Potential Wells with no rigid walls.(wkb approximation )
@bhsieh35378 жыл бұрын
At 17:40 integration by parts is uv-integral(v*du). Why would you put du*v?
@sophiac.700 Жыл бұрын
on the second page, there is a small typo. you said sqrt{n} but wrote down sqrt{2} on the denominator
@biotech14688 жыл бұрын
Informative and enlightening
@mathfreak25215 жыл бұрын
Isn't it the coolest thing ever 🤗 ??( Me pretending i understand something in this LABYRINTH )
@hrkalita1593 жыл бұрын
Thanks for these videos Really helped a lot
@janasandmeyer34065 жыл бұрын
A hilbert space can be finite dimensional
@Mr35diamonds8 жыл бұрын
You read my mind regarding uncertainty principle......
@abbashusain60535 жыл бұрын
really helpful, thanks
@erbazkhan2663 жыл бұрын
Can anybody explain check your understanding problem?
@turboleggy3 жыл бұрын
First one I think just means the expected value of x. Since the integral would be psi star * x * psi over the domain and that is what means. (I'm not sure exactly what he is looking for here) Second one would be zero. This is because states of the QHO are a orthogonal basis. X hat is hermitian because xhat = x and it is a real number and therefore it is commutative so =int( psi star * x * psi ) = int(x *psi star * psi) = * means multiplication not star
@carlosmmartinez14083 жыл бұрын
thaks this is helpful. I love you
@zairaner14898 жыл бұрын
But wouldn't the (impulse) operator still be hermitian without the minus? You wouldn't have a minus at the end, but you would also not need one? Or more general, I would say that for a hermitian operator A -A is also hermitian (because =-=-=)
@إحساسفيزيائية4 жыл бұрын
Thanks 💜💜
@synchronicitystudios82175 жыл бұрын
Thank you
@ankitmishra27233 жыл бұрын
Thanks sir
@andrevlok99325 жыл бұрын
But can it run X
@Maxwell_Integral Жыл бұрын
Because i have an IQ of 23, does this video include determinate states? EDIT: I'm sorry I am so dumb I just found It
@user-vh4jn4vv8e7 жыл бұрын
Nice
@santino42034 жыл бұрын
Who would dislike wth?
@mlungost6 жыл бұрын
The way you did the momentum operator example is not great for those us attempting to follow what you did., please consult the Griffiths book
@backupemail68317 жыл бұрын
wat
@externitiy36926 жыл бұрын
Wtf im just 8th grade and i just understand a bit of this.
@milk96135 жыл бұрын
SunDarating am just 2 grade
@Oliver-xt5wu5 жыл бұрын
I'm first grade and I'm already at Phd level
@milk96135 жыл бұрын
O. G Austin Am owen a lott of besnisis. Am new stev job.
@allanhuang3361 Жыл бұрын
@@milk9613 I am become death, the destroyer of worlds
@gamerdude191835 жыл бұрын
brain hurtie
@jagergaming22816 жыл бұрын
ummmmmmmmmm... im trying to find out wtf this guy is talking about, I can do things like calculus, but this, this just gets complicated, and I wanna know how to actually use this, and calculate something out of it, and properly use this.
@osamaishtiak61356 жыл бұрын
Well then you'll need to do atleast a bachelor's in physics. For quantum mechanics first learn linear algebra, fourier transforms and special functions (Mary Boas' book is great for this)[you should also learn how to solve differential equations; partial differential equations are a bonus] . Then start with Quantum Mechanics by David Griffiths which is what this guy is following. Also the math used here is not complicated, if you are comfortable with calculus upto calculus 3 and linear algebra then this math is trivial.
@Salmanul_4 жыл бұрын
You can watch his earlier videos and also read the book "Introduction to Quantum Mechanics" by David Griffiths which he is following
@darkzombie5243 жыл бұрын
Just copy pasted griifiths, you totally made a mess of the standard deviation formula. Came here to understand it. YOU FAILED SUCCESSFULLY.
@SumitYadav-mx8bp3 жыл бұрын
Completely agree with you ! he pretends to explain everything but he's actually failing To explain anything in a coherent manner
@stefanrolfs4192 жыл бұрын
The definition of variance in statistics is (X−⟨X⟩)^2 which can be written as ⟨X^2⟩−⟨X⟩^2. This relates to QM with (Q−⟨Q⟩)^2 and in its expanded form is (Q−⟨Q⟩)(Q−⟨Q⟩) = Q^2−2⟨Q⟩Q+⟨Q⟩^2 . Meaning ⟨ψ|Q^2|ψ⟩^2 − 2⟨Q⟩⟨ψ|Q|ψ⟩ + ⟨Q⟩^2. This simplifies to ⟨Q^2⟩ - ⟨Q⟩^2 as -2⟨Q⟩⟨ψ|Q|ψ⟩ = -2⟨Q⟩^2.