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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
36,471 
Hi Everyone
I am wondering about something. As everyone here knows, electromagnetic waves obviously possess an...

Jul1114 03:15 AM
PhilDSP

34 
2,836 
First, Schrodinger's Cat:
Photon emitter, pointed at a halfsilvered mirror, such that 50% of the wave hits a...

Jul1114 02:40 AM
Demystifier

47 
4,367 
Hello guys, I am working on Ch22 "Continuous symmetries and conserved currents" of Srednicki QFT book.
I am trying...

Jul1014 08:28 PM
wphysics

0 
905 
Hi there:
I am reading a book (AtomPhoton interaction by Claude CohenTannoudji, Page 448) and the following...

Jul1014 07:58 PM
kith

2 
943 
If a theory is spontaneously broken, you usually make calculations by expanding the field about the groundstate...

Jul1014 04:22 PM
geoduck

0 
758 
I found this article recently on Wired.com and thought others might like to see it.
Basically its revisiting...

Jul1014 02:26 PM
jedishrfu

4 
977 
Forgive the title if improper, the language of QM is not my native tongue. :)
All scenarios where QM is invoked that...

Jul1014 01:52 PM
QuestionMarks

8 
1,367 
Hi Everyone
I am not sure of what exactly happens when a wavefunction collapses but I have some ideas about which I...

Jul1014 12:45 PM
bhobba

1 
759 
In highschool I took an advanced physics class, in which we learned the Bohr Derivation, after the lesson my teacher...

Jul1014 12:45 PM
peterchr006

3 
949 
The same thing as title.

Jul1014 09:29 AM
Matterwave

4 
825 
Bell & Aspect proved you can't have local realism. Bohm set up a model that is realistic but not local. Is there a...

Jul1014 06:27 AM
Demystifier

10 
1,143 
Consider the classical double slit experiment where we are shooting electrons trough a double slit and then capture...

Jul914 07:34 PM
rkastner

30 
3,686 
because of the probabilities located in the equations of QM, wave functions and uncertainty principles?
Instead of...

Jul914 04:49 PM
DaleSpam

11 
1,658 
:confused: HI,
is wave behaviour on a two dimensional field or in a multidimensional field in space??
i am...

Jul914 04:17 PM
mfb

7 
1,399 
I thought it might be interesting to point out this article:
Title: Violation of Bell's inequality in fluid...

Jul914 03:42 PM
DrChinese

7 
1,239 
I am reading about the ionization energy in semiconductors and came across this thing that for Silicon, the ionization...

Jul914 09:36 AM
newuser

4 
1,070 
I'm watching first and second semester undergraduate level quantum mechanics online (MIT Open Courseware). I am...

Jul914 09:31 AM
bhobba

5 
891 
Is the spin of an electron still \hbar/2 in the direction transverse to its momentum? Classically angular momentum...

Jul814 11:03 PM
strangerep

50 
6,686 
Hi, there. The following is copied from a book " atomphoton interaction " by Prof. Claude CohenTannoudji, Page 415....

Jul814 12:53 PM
mfb

3 
965 
This is my first post. Please pardon me if I am breaking any forum rules.
While going through Wikipedia I came across...

Jul814 09:45 AM
Demystifier

1 
687 
I am not going to look up specific threads to support that assertion because I assume they have been seen by all those...

Jul814 08:48 AM
Demystifier

106 
8,920 
I deliberately wrote that heading not quite accurate, as a photon is more of a probability thing, and so might not...

Jul814 08:09 AM
tim9000

22 
3,407 
Hi Everyone
I am a bit confused about something. I have been taught that wavefunctions are basicaly the square root...

Jul814 07:48 AM
kith

3 
767 
Hi.
This is clearly wrong, but I don't know where is the error:
##\langle n\vert = (\vert n \rangle )^* =...

Jul814 05:22 AM
carllacan

2 
667 
I saw this the other day on a physics joke and i was wondering if anyone could tell me what it represents.
...

Jul714 09:51 PM
TumblingDice

4 
809 
What exactly did Max Planck assert regarding the discrete quantum nature of energy that was so significant to the...

Jul714 04:59 PM
PeterDonis

3 
740 
When it actually 'equal to' in uncertainty principle?
For example under what conditions:
ΔxΔt = h/4pi

Jul714 01:40 PM
marcusl

2 
693 
An infinitesimal transformation of position coordinates in a d dimensional Minkowski space may be written as...

Jul714 09:46 AM
samalkhaiat

38 
3,032 
Forwarded an article onto a Professor of Physics, and he replied with a comment about an article he'd written for...

Jul714 08:10 AM
DrChinese

4 
513 
Is the function sinx/(x^2) a physically valid wave function? since Born's conditions state that the function should be...

Jul614 11:59 PM
bhobba

4 
414 
Why do wavefunctions in quantum mechanics need to be complex? What are the drawbacks of using real valued...

Jul614 06:17 PM
nonequilibrium

14 
1,611 
If so, is 'its half' also not a real size of space?
What I am asking is pretty much; what is the meaning of the...

Jul614 03:12 PM
UltrafastPED

1 
280 
Hey there.
My goal is to understand the origin of the main forces that keep together an optical lattice created by...

Jul614 03:09 PM
UltrafastPED

1 
319 
Hi all,
So I was recently set straight on the fact that bound state does *not* necessarily mean E<0 but rather is...

Jul614 11:34 AM
"pi"mp

2 
308 
I am trying to find a definite answer whether the following version of the doubleslit experiment has ever been...

Jul614 08:45 AM
Doc Al

126 
6,351 
Depending on who one asks and their interpretation of QM, entanglement seems to be either:
a) No problem at all....

Jul614 06:41 AM
mfb

66 
4,591 
Hi guys, I have a few questions regarding Feynman's formulation of quantum mechanics.
Given the propagator...

Jul514 07:16 PM
RUTA

15 
1,086 
I've usually heard the manyworlds interpretation described in the Schroedinger picture, in which the wave function...

Jul514 01:55 PM
Demystifier

5 
584 
http://en.wikipedia.org/wiki/Gamma_matrices#Normalization
See the image below. Which of us is right: me or...

Jul514 11:24 AM
samalkhaiat

62 
6,931 
I want to show that the group SU_L(N)\times SU_R(N) is the same as SU_V(N)\times SU_A(N)  i.e. that it is possible to...

Jul514 11:05 AM
samalkhaiat

11 
1,011 