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  • 0 posts edited
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  • 32 votes cast
Nov
20
accepted Finding hilbert space basis
Nov
20
revised Finding hilbert space basis
added 13 characters in body
Nov
19
comment Finding hilbert space basis
I'm not sure of what a "outer product" is. Isn't that a cross product ? So by taking $\phi_1 \times \phi_2$ I get a third vector $N_3\phi_3$ orthogonal to the other two. And if I normalize it to 1, I get $N_3 = \frac{1}{\sqrt{6}}$, correct ?
Nov
19
revised Finding hilbert space basis
added 96 characters in body
Nov
19
asked Finding hilbert space basis
Oct
1
awarded  Popular Question
Sep
30
comment Differentiate a function with respect to a vector
It is indeed from non-relativistic QM. I'm going to follow your advice and keep using the course's notation for the time being then. Thanks :)
Sep
30
accepted Differentiate a function with respect to a vector
Sep
30
comment Differentiate a function with respect to a vector
Can I summarize the two equations this way : $\nabla\psi = \frac{i}{\hbar}\psi(p_x, p_y, p_z, -E)$ ?
Sep
30
asked Differentiate a function with respect to a vector
Aug
24
awarded  Yearling
Jun
9
revised Fourier transform of $f'(t)$
deleted 6 characters in body
Jun
9
accepted Fourier transform of $f'(t)$
Jun
9
asked Fourier transform of $f'(t)$
Jun
8
revised Limit of sinc and dirac delta
added 309 characters in body
Jun
7
comment Limit of sinc and dirac delta
Intuitively, by looking at the picture I can see that it's true, but I don't understand how to evaluate the limit for $\omega \neq 0$
Jun
7
asked Limit of sinc and dirac delta
Jun
7
accepted Fourier transform of the Fourier transform
Jun
6
comment Fourier transform of the Fourier transform
Ok. I still don't understand how $e^{-it(\tau+\omega)}dt = e^{-itu}du$ though... if $u = (t+\omega)$ then $e^{-itu}du = e^{-it^2-it\omega}dt$ ?
Jun
6
comment Fourier transform of the Fourier transform
So, where does the formula with $2\pi$ come from ?