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A duck walks into a bar. Animal control is promptly called and the duck is released into a near by park.


Sep
11
awarded  Nice Answer
Sep
11
comment How can we say that a wave function follows schrodinger equation using operators?
If by energy operator you mean that it's a function value of $H$, i.e. $Â=F(H)$, for example $Â:=4H+H^4$, then $Â$ and $H$ have the same eigenfunctions. (I'm pretty sure about this, certainly in the common cases, but not in general. Look up the spectral theorem. Maybe there are pathological functional analysis scenarios I can't think of right now, it happens sometimes. You know, such that if $F$ is ill-behaved, the domain of $H$ and $F(H)$ is different etc.)
Sep
11
revised How can we say that a wave function follows schrodinger equation using operators?
added 5 characters in body
Sep
11
answered How can we say that a wave function follows schrodinger equation using operators?
Sep
6
comment Difference between Hamiltonian in classical Mechanics and in quantum Mechanics
@Wingonafly: Regarding your response to the second point, what you derive from what is a matter of choice. Usually the Schrödinger equation isn't taken to be derived from anything but taking as a starting point. I don't know what you mean by "How do you answer the question about..." because your initial post didn't even include specific questions. A main difference is that classical observables always commute.
Sep
6
revised Difference between Hamiltonian in classical Mechanics and in quantum Mechanics
added 15 characters in body
Sep
6
answered Difference between Hamiltonian in classical Mechanics and in quantum Mechanics
Aug
22
revised How long does it take plasma to radiate its heat?
gramma etsetera
Aug
22
suggested suggested edit on How long does it take plasma to radiate its heat?
Aug
19
comment How much energy would the Human Torch need?
Joke's on you, The Human Torch is pretty far from being human.
Aug
3
awarded  Popular Question
Jul
28
comment Is this really a golden ratio spiral?
Do you know what the object of your interest actually is? If no, search the web for a definition. Once you understand it, there will be no barrier to take the picture and test it yourself.
Jul
24
revised Bug riding on a ball moving at almost the speed of light
description?
Jul
24
suggested suggested edit on Bug riding on a ball moving at almost the speed of light
Jul
10
comment How can blackbody radition be explained by quantization?
Maybe this question relates as well.
Jul
8
comment Laplace operator's interpretation
@mcodesmart: don't worry.. it was fun!
Jul
7
comment English translation of Heisenberg's paper ``Über den anschaulichen Inhalt der quantentheoretischen Kinematik und Mechanik''
As a German speaking person, I'd like to add that I find the translation "actual content" a little debatable. It sounds harsher than "anschauliche Inhalt", which could be translated to "the content which can actually be visualized (maybe opposed to that which is formal but has not clear correspondence to something real)". In particular, "actual content" implies that the other half isn't proper content, while the German expression doesn't imply that.
Jul
2
comment Relationship between the continuity equation and the wave equation
Well, have you studied that free field theory on its own? Hint: If you define a trajectory by $x''=0$ in Newtons theory, then the kinetic energy is $\propto x'^2$ which you can also express via momenta $p\propto x'$ and by the way $p'=0$. If you're interested in $\partial^2\varphi=0$, the Lagrangian is $\propto (\partial \varphi)^2$ and now what you do is introducing the letter $J\propto\partial\varphi$.
Jul
2
awarded  Inquisitive
Jul
2
awarded  Curious