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Feb2313 08:38 AM
ZapperZ

1 
30,407 
I would like to know if the electric charge of a particle, like electron, has always a definite value, or on the...

May1510 10:22 AM
chrisphd

10 
2,702 
what is the JOst function and how and why it appears in Scattering problems ?,
for example given the Hamiltonian ...

May1510 09:02 AM
zetafunction

0 
2,409 
Could someone please help me get a very basic intuitive understanding of what rotational and vibrational quantum...

May1510 02:24 AM
ansgar

1 
858 
Do the so called "Bell States" form a basis for any arbitrary two particle state, including nonentangled states?

May1510 12:08 AM
chrisphd

0 
669 
Hey,
the coupling constant in QFT is scale dependent. This scale \mu, it seems to me, is a mathematical tool used...

May1410 03:36 PM
humanino

2 
872 
Hahaha, yeah I did a search on these forums for questions regarding Virtual Particles and it seems its "the horse...

May1410 12:56 PM
humanino

2 
850 
I might make a cloud chamber, which requires for a very small amount of lead 210 on a needle tip, and i have found a...

May1410 09:11 AM
sweet springs

1 
1,616 
I was doing an undergrad experiment on the sodium emission spectrum and I have a few queries. Of course, I was asked...

May1410 05:50 AM
Vanadium 50

31 
17,246 
I want to know how to normalize symmetric and antisymmetric wave functions ???????????

May1410 02:53 AM
ansgar

1 
918 
We have the uncertainty principle. How would our world be different, if someone measured position and momentum of a...

May1310 12:55 PM
SpectraCat

3 
1,368 
Yes, I know the thread name sounds like something you might see on the cover of Discover (or sadly, Scientific...

May1310 09:55 AM
Lord Crc

144 
11,198 
It is sometimes said that wave functions are not real, and simply represent the observer's knowledge of the system. I...

May1310 08:57 AM
DevilsAvocado

78 
6,715 
The wave function of "particle in a box" is Asin(kx).
Since potential energy is zero inside the box, so the...

May1210 06:38 PM
sweet springs

12 
7,168 
I've heard the twoslit experiment described over and over, but there's still something about it that seems unclear to...

May1210 06:36 PM
DevilsAvocado

35 
5,178 
I don't usually consider "waves" to have mass. They're just energy that moves THROUGH mass. Light waves, sound waves,...

May1210 03:45 PM
LostConjugate

32 
2,555 
I need a calculation section of the article without Compton scattering method does not use quantum field theory.
Can...

May1210 12:22 PM
humanino

1 
771 
If I fire photons at a glass, some will be reflected back and some will go through. Which ones is by deifnition...

May1210 12:21 PM
DrChinese

3 
842 
Hi,
I'm a novice at quantum and I was just wondering why an electrically neutral fluorine atom needs to...

May1210 11:22 AM
SpectraCat

8 
2,102 
It puzzles me. In Einstein's paper on the photoelectric effect he proposed that photons with E = nhf were the...

May1210 10:58 AM
LostConjugate

0 
764 
Hi,
I was wondering if anyone could explain how Srednicki gets to his eqn 26.7:
\tilde{dk_1}\tilde{dk_2} \sim...

May1210 03:10 AM
haushofer

5 
806 
This might seem like a foolish query, but I'm having a hard time understanding the rules of degenerate states. I know...

May1210 12:48 AM
diazona

2 
835 
Does the momentum space of a particle in an infinite square well have spikes or is it continuous?
I've heard so...

May1110 09:44 PM
sweet springs

7 
1,925 
Is there agreement here or are all/most of the neutrons in the same state?

May1110 03:01 PM
Frame Dragger

13 
1,456 
Hi,
Source: http://arxiv.org/abs/0808.3316
I haven't studied more than the basics in QM. Therefore I don't...

May1110 02:36 PM
billbray

3 
1,933 
I'm losing my mind trying to differentiate spin, isospin, weak isospin; then there's chirality, helicity  i must be...

May1110 02:29 PM
haael

2 
3,168 
When talking about classical probabilities, like whether the ball is in one of two boxes, with 1/2 probability for the...

May1110 12:13 PM
haael

7 
1,027 
I read two articles recently and I am wondering if I have the correct interpretation of them.
They deal with joint...

May1110 07:09 AM
Demystifier

17 
4,741 
I wonder how Dirac equation transform under change of coordinates (in flat spacetime).
Should I simply express...

May1110 06:04 AM
schieghoven

1 
870 
Hello!
I wonder is there exist a way to deduct the conserved current equation, generator of
the...

May1110 02:35 AM
Dyson

2 
819 
This question relates to Griffiths: Introduction to Elementary Particles, p. 196
The process in question is a...

May1010 05:39 PM
clem

1 
2,861 
The current Young optical experiment induces interference between 2 waves when the two intermediary holes are opened...

May1010 04:22 PM
DrChinese

4 
1,458 
thinking about ray tracing from another thread and musing a bit on it I wondered something.
In all cases that I've...

May1010 04:09 PM
madhatter106

0 
805 
I read in a book:
For a qubit defined as: \frac{1}{\sqrt{2}}(0\rangle + 1\rangle)
Since 0\rangle and...

May1010 03:53 PM
kanato

4 
882 
An alphaparticle produced by radioactive decay leaves a visible continuous track in a Wilson Cloud Chamber. As it...

May1010 03:25 PM
humanino

1 
907 
Looking at the KG propagator given in: http://en.wikipedia.org/wiki/Propagator#Scalar_propagator, I can't seem to...

May1010 03:18 PM
Heirot

0 
1,094 
I've had some trouble with the argument "spin angular mometum has no classical analogue", that everyone seems to be...

May1010 12:04 PM
chwie

17 
4,781 
Hi,
I am currently working through Griffith's textbook on quantum mechanics.
I was just wondering if there are...

May1010 11:49 AM
Fredrik

2 
883 
I don't have any problems dealing with mechanical calculations(I think), but yet I have some conceptual problems with...

May1010 12:14 AM
ahmad2l

6 
10,681 
So, rookie question, I know, but I'm having a little trouble with the idea of wavefunction collapse as it pertains to...

May910 08:49 PM
wduff

2 
1,760 
Hi PhysicsForums,
I'm writing a term paper on the properties of the von Neumann Entropy, its relation to the...

May910 06:29 PM
LukeD

2 
1,006 