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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
36,357 
If I set up an interference experiment and make one path much longer than the other would I still see an interference...

Feb906 05:53 AM
vanesch

1 
1,251 
I was reading some some popular science rags and came across an article that espoused:
But I didn't think all...

Feb1206 04:07 PM
QuantumUnbound

0 
2,489 
I'm working on a research paper on Quantum Entanglement and came across something I don't understand. (I assume this...

Dec1709 11:21 PM
QuantumVegan

8 
2,001 
http://imageshack.us/photo/myimages/40/63636538.png/

Feb1413 02:39 AM
QuantumWild

0 
372 
Before I make my post, I'd just like to introduce myself. My nickname is quantum_foam, as you can see (it's from the...

Nov803 11:35 PM
quantum_foam

4 
1,248 
In F. Wilczeks book, The Lightness of Being he describes his theory on the origin of mass. He explains, in much more...

Jan1009 01:56 PM
malawi_glenn

2 
810 
OK, I have a problem with the manyworld interpretation, namely the quantum suicide experiment. My problem: How...

Jun2806 11:32 PM
koantum

58 
7,986 
Imagine you have two plates which can either be perfectly conducting or perfectly insulating by changing some...

Nov506 07:34 PM
Epicurus

8 
1,914 
I am reading chapter three of Huang's Statistical Mechanics and I have a problem with equation (3.22). Having...

May1912 08:03 AM
QuArK21343

2 
589 
I am told that when an atom absorbs a photon, it jumps up an energy level, these are discrete levels of energy etc...

Apr711 07:41 PM
Einstein Mcfly

3 
864 
Hi, I have a ground state wavefunction, $$ \psi_0(\xi) = A_0\exp(\frac{1}{2}\alpha\xi^2), $$ (##\alpha## is a...

Dec1313 07:45 AM
quarkgazer

0 
384 
Since it appears (so far) I am infringing no rule, here is another shameless copy/paste of a thread I started on...

Oct2408 06:19 PM
Haelfix

1 
1,174 
Hi
In double slit experiment our observe can change the past and in the entanglement our observe affact other...

Dec1313 09:44 AM
Quarlep

10 
750 
Spin is a quantity of vector but I dont know how to add them ? Please be simple
Thanks

Aug1414 09:19 AM
Quarlep

2 
165 
I watched a video about particle physics and there I saw something strange(for me)...

Aug1814 02:18 AM
MrRobotoToo

6 
369 
Why is there no kinetic energy term in said hamiltonian? Suppose I take a magnetic dipole in my hand, and I throw it...

Dec2405 11:17 AM
abszero

3 
6,286 
I've always wondered what is considered to be 1 photon. We always see things like "When two of these particle collide,...

Nov2708 09:46 PM
enotstrebor

34 
10,872 
I am reading the first chapter of Sakurai's Modern QM and from pages 30 and 32 respectively, I understand that
(i)...

Aug1106 03:21 AM
dextercioby

5 
1,474 
The SE is written in terms of a potential energy. It says, "given a particle in a region where the potential is...

Oct406 08:29 PM
Galileo

4 
1,951 
How should \Delta E \Delta t \geq \hbar/2 be interpreted? When does it apply? Delta t refers to the time of what? etc....

May712 06:40 AM
Demystifier

10 
8,311 
In Reif's thermo book, one can read
"Consider a substance which contains n magnetics atoms per unit volumes and...

Nov1306 10:57 AM
quasar987

5 
5,092 
In my thermo text, they consider a diatomic molecule that is rotating about the axis joining the two atoms (also the...

Nov1406 09:42 PM
quasar987

5 
2,287 
Hi,
I have a problem with the very nature of time dependant perturbation theory (TDPT). In TDPT, we consider a...

Mar1607 02:23 PM
vanesch

3 
1,493 
Hi,
Is there an explicit formula for the eigenfunctions of the harmonic oscillator? By explicit, I mean "not...

Mar2707 03:30 AM
christianjb

8 
4,073 
As I understand (from reading p. 206 of Marle's 1975 text on geometric quantization available on the french wiki page...

Mar2512 09:37 AM
fzero

9 
1,407 
So, I'm pretty sure this is trivial, but I just want to be sure:
My QM book frequently uses both the terms...

Oct2708 01:25 AM
newbee

2 
1,116 
I have been reading about some quantum gravity topics, and am wondering: how many different modifications to the...

Nov708 03:09 AM
Haelfix

3 
1,160 
I was thinking about bound and unbound states the other day and want to know:
Is unboundedness a requirement for a...

Jul2909 01:45 PM
maverick_starstrider

1 
978 
I need someone to tell me if I'm understanding things. :shy:
Let's say that we're studying the infinite square well...

Aug2609 10:11 AM
olgranpappy

3 
688 
Can anyone expand on the relationship between Lie groups, Lie algebras, exponential maps and unitary operators in QM?...

Sep2909 01:00 PM
meopemuk

4 
1,106 
I'm reviewing my undergraduate quantum mechanics from a while back, and I am not quite sure I understand this...

Jan2810 02:51 PM
PhilDSP

8 
1,538 
I am having trouble understanding how a wavefunction for three or more particles can be totally antisymmetric. Does...

Feb1410 02:32 PM
ansgar

1 
685 
After reading Seth Lloyd's book “Programming the Universe”(only once) I came up with a few questions. The way I...

Jul2107 12:16 PM
vpoko

1 
1,094 
I am wondering about acceleration in quantum mechanics. Let's consider spherically symmetric potential V(r). From the...

May1913 08:56 PM
HomogenousCow

4 
676 
Consider a particle approaching a finite potential step or inside a potential well. As we know, the particle has a...

Jun1412 10:35 AM
Demystifier

9 
1,717 
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 
1,283 
Does the measurement problem ("wave function collapse") or something similar somehow manifest itself in QED and other...

May2514 09:47 AM
DrDu

44 
1,350 
I was thinking if you entangled both the electron and positron in a states that both of thier orbitals don't interact....

Aug1005 06:12 PM
Rade

1 
1,733 
I was wondering that if neutrons stablize that atomic nuclei then it should stablize other systems.
Or can other...

Nov2311 12:29 PM
0800peter

10 
2,422 
Is there any way to stablize these particles?

Aug1105 01:27 AM
quasar987

1 
1,151 