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Feb2313 08:38 AM
ZapperZ

1 
36,322 
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 
4,567 
Hi guys, I have a few questions regarding Feynman's formulation of quantum mechanics.
Given the propagator...

Jul514 07:16 PM
RUTA

15 
1,071 
I've usually heard the manyworlds interpretation described in the Schroedinger picture, in which the wave function...

Jul514 01:55 PM
Demystifier

5 
581 
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 
6,903 
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 
1,004 
Hi all,
I haven't been able to find an answer online but this seems like a pretty basic question to me. What are the...

Jul514 10:56 AM
WannabeNewton

13 
676 
I am not a student. I am a retired Chemical Engineer and a retired IT Auditor (exISACA member). My questions are a...

Jul514 10:28 AM
afcsimoes

7 
818 
I was reading this paper and it'll form the basis of my undergrad thesis. The algebraic Bethe ansatz for scalar...

Jul514 05:35 AM
Maybe_Memorie

3 
727 
Apologies if this has been discussed  new experiments with oil droplets are helping to revitalize discussion of the...

Jul414 10:42 PM
DaleSpam

2 
465 
I'm totally confused. Everywhere I look, most explanations of how magnetism works doesn't include anything about the...

Jul414 09:33 PM
bhobba

12 
1,871 
Could anyone give a really quick explanation for gauge theory to me?
Or a link, or a book is perfectly fine.
I just...

Jul414 09:20 PM
bhobba

6 
431 
Let us consider a quantum wave of one very energetic particle, stored in 100 microscopic jars. There's some lock...

Jul414 07:12 PM
Simon Bridge

8 
773 
I'm trying to work out why electrons don't crash down into the nucleus using HUP. So if we take 10^10 meters, the...

Jul414 05:57 PM
Jd0g33

2 
438 
Hi
I have been looking at the solutions to a past exam question. The question gives the annihilation operator for the...

Jul414 03:52 PM
dyn

6 
588 
Hi.
I was reading timedependent perturbation on Sakurai and it mentioned that a certain state was "populated"....

Jul414 02:29 PM
mfb

1 
293 
Are electrons closed systems?

Jul414 11:01 AM
Jano L.

13 
1,441 
Hi,
I am a highschool student who recently finished the chapter on QM. I thought I completely understood it, but...

Jul414 10:15 AM
bhobba

6 
625 
When using Fourier's trick for determining the allowable energies for stationary states, Griffiths introduces the a+...

Jul414 03:01 AM
PhilDSP

1 
524 
I am watching James Binney's QM lectures on iTunes University, and also going through his free textbook. He is a...

Jul314 10:04 PM
samalkhaiat

7 
766 
For the infinite square well in onedimension the wavefunctions have the form Acos(kx) where k is the wavenumber which...

Jul314 06:51 PM
jk86

5 
805 
In his lectures on quantum mechanics, Feynman treats the hydrogen molecule as a twostate system to give a general...

Jul314 12:18 AM
damosuz

17 
2,451 
I am working on problem a professor gave me to get an idea for the research he does, and have hit a point where I'm...

Jul214 07:19 PM
dreinh

0 
516 
When I think of frequency, I think of something happening per second or per unit time. When light is a wave, I can...

Jul214 03:45 PM
jambaugh

1 
511 
Hi.
In 2fold degenerate perturbation theory we can find appropiate "unperturbate" wavefunctions by looking for...

Jul214 10:23 AM
stevendaryl

2 
617 
Hello everyone,
I am reading about the Finite Square Well in Griffiths Quantum Mechanics Text. Right now, I am...

Jul214 09:42 AM
WannabeNewton

1 
551 
I'm trying to understand why the WKB approximation doesn't seem to work in the following case.
Suppose you have a...

Jul214 08:13 AM
phsopher

6 
730 
Hi Everyone:
I think some of you who familiar with quantumoptics know that the local photonic density of state can...

Jul214 04:48 AM
Jeffrey Yang

4 
618 
So, I've been looking into orbital angular momentum and magnetic moments, (which, at least in normal space with a...

Jul114 02:24 PM
Bill_K

1 
723 
Hey Guys.
I'm having trouble wrapping my head around the idea of a particle being in a classically prohibited...

Jul114 01:06 PM
anorlunda

24 
2,250 
I'm studying by Statistical Mechanics (Huang, page 180) but can't understand many things there, can anyone provide a...

Jul114 10:38 AM
Demystifier

9 
965 
I have some questions about double slit experiment.
1) Sometimes photons or electrons should bounce off the...

Jul114 01:55 AM
Agramenauer

11 
1,135 
I have a few questions about the Pauli exclusion principle:
1. Why do physicists believe that the symmetry in the...

Jun3014 02:26 PM
MadRocketSci2

3 
690 
Hi.
According to Griffiths the conmutation relations for the angular momentum and spin operators conmutation...

Jun3014 11:02 AM
WannabeNewton

1 
663 
Can someone explain the process?

Jun2914 11:18 PM
UltrafastPED

1 
474 
There are many things in this sentence that I don't get
What does exactly mean intrinsic dependenc? I think I...

Jun2914 03:58 PM
carllacan

5 
1,063 
How are the track leftt say by an electron in a cloud chamber and its wave function undefined trajectory related...

Jun2914 01:47 PM
TrickyDicky

124 
7,767 
If it’s true that every atom has negatively charged electrons on its outer shells, and if it’s true that all matter is...

Jun2914 01:31 PM
berkeman

3 
604 
I have been reading and would be interested in feedback to the comments that I make, below.
One of the points made...

Jun2914 07:50 AM
stevendaryl

30 
2,407 
Hi.
I was wondering why creation and destruction operators a+ and a do not conmute.
Of course, I can show that...

Jun2914 02:48 AM
homeomorphic

5 
673 
Every time i see it it's different. I want the full planck constant(every number) and is there any proof for the...

Jun2914 12:13 AM
Nick O

7 
752 