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Feb2313 08:38 AM
ZapperZ

1 
35,150 
I want to know that ,I have read in many books regarding compton's effect that a photon collides with an electron and...

Jun2014 05:02 AM
Esfand Yar Ali

7 
294 
I'm not a physics major and I have only a minimal/mild understanding of physics at best, and I have a question.
...

Jun2014 04:33 AM
Demystifier

14 
511 
Hi all,
I was wondering if anyone could clarify my understanding of unitary time evolution of quantum states, in...

Jun1914 09:49 PM
"Don't panic!"

8 
353 
I would expect that the Heisenberg equation of motion for the Dirac field would yield the Dirac equation. Indeed,...

Jun1914 06:35 PM
pellman

9 
457 
The situation I am considering is that of a single photon directed at a target (say a photographic plate). My...

Jun1914 10:53 AM
fredsie

10 
451 
Hello,
I would like to understand why particle are caraterized by their wave funtion ? Why parameters are...

Jun1914 03:25 AM
kroni

14 
504 
https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Beta_Negative_Decay.svg/310pxBeta_Negative_Decay.svg.png
...

Jun1814 09:41 PM
Vanadium 50

5 
354 
What gives an atom its atomic spin?

Jun1814 01:40 PM
Orodruin

2 
250 
I've tried looking this up online, but people only ever talk about the basic principles and formulas involved instead...

Jun1814 11:19 AM
SquidgyGuff

7 
396 
I saw a very old post where someone asked where an electron gets it's charge. Where does the charge come from? Doesn't...

Jun1814 01:45 AM
Crapsghetti

11 
448 
when anything moves it displaces space and generates gravity waves, So does this also happen at the quantum level?...

Jun1714 10:38 PM
ZapperZ

6 
385 
Quantum entanglement is a concept that has captured my imagination and has intrigued me very much in the past few...

Jun1714 04:43 PM
Nugatory

18 
631 
On a mathematical level, the statistical mechanical partition function is just a Laplace transform of the...

Jun1714 01:33 PM
bolbteppa

0 
204 
Hi,
I am reading about the quantum model of the atomic structure, and recently encountered the Schrödinger’s model....

Jun1714 07:33 AM
tlnarasimham

3 
407 
quite simply the above question.
Why does quantum entanglement not allow for faster than light communication?
Thanks

Jun1614 09:45 PM
DanCarpenter

91 
56,281 
When solving PauilSchrodinger Equation for 3fermions in a potential well and a magnetic field, we basically solve...

Jun1614 02:03 PM
rigetFrog

5 
319 
I have a question about the Zeeman effect and pertubation theory. I read in Griffiths that with the strong Zeeman...

Jun1614 12:15 PM
The_Duck

3 
327 
Hi, there.
I am a little confused about the following statement in Wikipedia. and it's about the density operators....

Jun1514 08:55 PM
Robert_G

27 
761 
I have a quick question about blackbody radiation.
Planck modelled a blackbody as a collection of harmonic...

Jun1514 04:32 PM
Jano L.

15 
439 
Hi all,
I want to learn Quantum Transport materials . I would like to know some good material to start with and...

Jun1514 02:24 PM
DrClaude

1 
183 
This is perhaps a stupid question, but are the field equations, for example, for QED useful for anything? By field...

Jun1514 10:04 AM
QuasiParticle

14 
1,255 
I'd like to know what exactly it's telling us. Does it mean that the more accurately we measure the energy of a...

Jun1514 09:52 AM
QuasiParticle

3 
370 
I know this may sound strange, given that we cannot really work out where in space a photon is because it cannot be...

Jun1514 09:49 AM
QuasiParticle

34 
901 
After suitable study I'd have to say that it is a misnomer to state that de Broglie's theory is not relativistic. But...

Jun1514 07:07 AM
UltrafastPED

9 
412 
Hello,
Interested mostlyamateur here with some questions about the Quantum erasure with causally disconnected...

Jun1414 04:54 PM
rkastner

2 
265 
Goodafternoon everyone,
I am looking to the RayleighJeans law derivation. In order to calculare the average energy...

Jun1414 03:18 PM
vabite

4 
265 
I believe I understand the mathematical derivation of the Dirac equation. I understand how the four 4X4 matrices, and...

Jun1314 12:12 PM
referframe

11 
492 
Let's say I have an anharmonic 1D oscillator that has the hamiltonian
##H=\frac{p^2}{2m}+\frac{1}{2}kx^2+\lambda...

Jun1314 06:43 AM
stevendaryl

3 
302 
Hello,
I am reading the book, The Quantum Theory of Fields II by Weinberg.
In page 426 of this book (about...

Jun1214 11:15 PM
wphysics

2 
294 
in an energy level of atom, electron can be found here or there by chance. I presume that the location electron can be...

Jun1214 09:54 PM
bhobba

2 
213 
What is the "A" in the wave equation: Ae^{i(kxwt)}? What does it mean in quantum mechanics? Is it just the amplitude?

Jun1214 09:26 PM
bhobba

2 
270 
What would happen if the double slit experiment were to be undertaken using white light, and one of the slits was...

Jun1214 08:06 PM
bhobba

5 
268 
I am just getting into quantum after a long absence of working on modern physics. I am having a go at "Introduction...

Jun1214 11:34 AM
kq6up

10 
351 
This question was on Stackexchange, and no one was able to solve it. So now I'm posting it here, and I wish someone...

Jun1214 08:04 AM
TheDestroyer

6 
311 
Hi Everyone
I have four questions about the nature of quantum superposition and wave functions:
1. If a particle...

Jun1214 02:13 AM
DrClaude

11 
378 
Maybe someone here can explain me something I never understood in QM: The wave function lives in the Hilbert space...

Jun1114 03:50 PM
Tosh5457

8 
432 
Hi Everyone
This is a question which, in various forms has been asked in various places on the Internet but I have...

Jun1114 03:24 PM
mfb

20 
1,367 
Hi,
Assume I’m solving a 2particle (fermions) problem in a potential well. If I set the wavefunction as...

Jun1114 07:12 AM
DrClaude

3 
199 
Hi all,
I know how if a statistical partition function is written as a path integral in imaginary time (Wick's...

Jun1114 01:24 AM
king vitamin

19 
502 
After reading an article on Planck length, I began to wonder whether or not the theoretical limit implied that...

Jun1014 09:09 PM
bhobba

6 
309 