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Feb2313 08:38 AM
ZapperZ

1 
34,456 
Hello everyone,
I recently found this forum and have a question about spooky entanglement. When I first heard of...

Jul3010 08:56 PM
QuarkCharmer

1 
713 
Hi,
for my exam i"m rereading Peskin&Schroeder and stumbled across equations 2.212.25 where the canonical...

Jul3010 08:06 PM
ismaili

19 
2,428 
Acc. to QM no two particles can be in the same state at the same position at the same time, but how does that...

Jul3010 07:48 PM
Fwiffo

51 
4,432 
for the Casimir effect to be observed, why must the opposing plates be conductors?

Jul3010 04:29 PM
Šquark

1 
1,415 
I've been following up a lot regarding the fascinating stuff I read here.
I recently came across this page;
...

Jul3010 03:53 PM
DevilsAvocado

31 
5,056 
what is exactly meant by wave nature,does the particle move like a wave or it moves along path of a wave or something...

Jul3010 08:44 AM
adaptation

10 
988 
I don't quite understand the treatment of discrete symmetries, for example, in Peskin's QFT book:
Because by...

Jul3010 08:33 AM
ismaili

1 
1,284 
Is it possible to move an entangled particle, without disrupting the wave function, to create a communication signal?

Jul3010 06:09 AM
vanhees71

6 
2,047 
My question is that is the fact, that all particles are either boson or fermions, only an empirical fact, or can it be...

Jul2910 08:43 AM
vanhees71

11 
1,396 
I often come across the assertion that light has zero mass. i was wondering is this a proven fact or just an...

Jul2810 10:53 PM
humanino

32 
4,620 
http://www.youtube.com/watch?v=DfPeprQ7oGc
This is from a stupid movie, lots of new age nonsense etc. However,...

Jul2810 10:49 PM
cesiumfrog

8 
1,141 
Uh, today I read some materials about quantum fidelity. In a pure state, which can be expressed by a wave function...

Jul2810 09:52 PM
Sillyboy

0 
783 
My first post. I'm an interested layman.
1. There was a thread about this a few weeks ago but it didn't have an...

Jul2810 09:48 PM
alt

5 
1,145 
I read about this stuff a few years ago, and it seems that nobody gives too much attention to it.
Its about an...

Jul2810 09:14 PM
ZapperZ

1 
937 
I thought this was interesting. My guess is that it will be published in Physical Review Letters.
We know of Jorma...

Jul2810 08:14 PM
marcus

0 
967 
Hi,
I just wondered if someone could check my understanding is correct on this topic. I understand that to find the...

Jul2810 06:13 PM
element4

10 
1,700 
Let's say we have photon beam with certain frequency. Now we make a choice to perform one of two noncomuting...

Jul2810 09:29 AM
DrDu

9 
1,551 
The two sets of matrices:
{G_1} = i\hbar \left( {\begin{array}{*{20}{c}}
0 & 0 & 0 \\
0 & 0 & {  1} \\
...

Jul2810 08:22 AM
inempty

9 
3,353 
Okay, let me begin by saying that I do NOT have a good foundation in quantum mechanics, but I have been completely...

Jul2710 04:23 PM
TheAlkemist

25 
3,201 
I'm currently reading Weinberg, see link for the relevant section.
In §5.3, the coefficient functions at zero...

Jul2710 03:41 PM
John_Doe

0 
840 
According to uncertainty principle we can’t specify the exact energy of system in a distinc time
On the other hand ...

Jul2710 12:34 PM
George Jones

11 
1,643 
Hi,
Does anyone know if there's a closed formula for the npoint function in a CFT? Up to anharmonic ratios, of...

Jul2710 10:23 AM
dodelson

2 
1,037 
My first post, a long term reader though and apologies if this has been dealt with elsewhere. I did several searches...

Jul2710 09:06 AM
Westic

0 
827 
Hi, this is my question:
suppose that at time t' our system is in the state  \psi(t')\rangle
The probability for...

Jul2710 06:15 AM
inempty

4 
1,213 
I keep hearing jargon like "the algebra generated by the hamiltonian", and I'd like to get to the bottom of it.
...

Jul2710 04:39 AM
xepma

2 
1,061 
In the Eric Weissteins's World of Physics entry on "Quantum Electrodynamics" he gives one of the governing equations...

Jul2710 04:24 AM
snoopies622

3 
1,288 
I just went to an astronomy this past week and one the lectures pertained to the particle zoo.
As the professor began...

Jul2710 03:44 AM
Demystifier

1 
758 
This problem borders with the question of either wave only or particle only descriptions of duality, and I think it...

Jul2710 01:46 AM
tom.stoer

32 
3,553 
A valuable math result for quantum mechanics is that if two hermitian operators (physical observables) commute, then a...

Jul2610 10:02 AM
Llewlyn

12 
2,565 
What equipment one can use to detect interaction between two massless particles, such a photons? Is that even...

Jul2610 01:15 AM
strangerep

1 
996 
What are the minimal conditions to have a nonrelativistic quantum theory like Schrödinger theory?

Jul2510 05:08 PM
tom.stoer

7 
942 
Hi,
I have come across a sentance in an article which I do not quite understand.
H1 is just a perturbation...

Jul2510 02:41 PM
torquil

1 
1,203 
I'm reading Quantum Field Theory in a Nutshell by Zee and I'm completely lost on something. In one of the appendices...

Jul2510 09:33 AM
NanakiXIII

8 
4,794 
When looking at information about the doubleslit experiment, you often see statements like...
"the photon interferes...

Jul2410 02:02 PM
lcdisplay

12 
4,015 
As I understand it, the magnitude of an L_z eigenfunction's value is independent of its argument's \phi coordinate...

Jul2410 01:14 PM
snoopies622

6 
1,446 
Obviously because there is a minus sign in 0 0> = 1/sqrt(2)*((up)(down)(down)(up)) but I guess I am not completely...

Jul2410 12:04 PM
Qrystal

16 
4,741 
Since there have now been directly observed superpositions in laboratory experiments, meaning of course that...

Jul2410 10:36 AM
marky3

10 
2,302 
Hi
I would like to know what your thoughts are on books that make an attempt to discuss quantum electromagnetism...

Jul2410 05:53 AM
AJ Bentley

2 
1,618 
I would hope this thread could be limited to Bellmathematical questions and answers concerning just one given Bell...

Jul2410 03:52 AM
JesseM

68 
7,119 
I'm really confused on this concept. Why is gravity considered a fictitious force and is it true that this concept is...

Jul2310 06:11 PM
Glen Bartusch

3 
1,374 