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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
30,405 
I was doing some reasearch on electrons, and I found that they have both particle and wave like characteristics. Is...

Mar1912 08:19 AM
jtbell

2 
805 
This set of equations has been going around on the /sci/ boards of 4chan lately, but hardly anybody there knows what...

Mar1912 11:02 AM
ThomasT

3 
1,066 
I have a doubt making a little of thinking of basic notions of QM and I think that the answer should be very simple...

Mar1912 05:02 PM
The_Duck

2 
652 
Where
http://upload.wikimedia.org/wikipedia/en/math/0/a/1/0a1c02498125a255a2f5b0e58908a8ae.png
How did he come up...

Mar2012 05:05 AM
genericusrnme

13 
1,351 
Please teach me this:
Why do we only consider symmetry group(Lie group and Lie algebras) but not general symmetry(the...

Mar2012 06:07 AM
A. Neumaier

29 
2,905 
This is an extract from the lecture notes I took for the 'Foundations of QM' third year course.
Copenhagen QM ...

Mar2012 10:44 AM
Khashishi

8 
1,775 
Hi folks. I'm wondering who does a good job of explaining this limit, preferably with a good set of examples. It...

Mar2012 11:51 AM
genericusrnme

1 
888 
Obviously a violation of the CHSH inequality means that local realistic theories are untenable.
If we sent two...

Mar2012 10:20 PM
StevieTNZ

8 
1,158 
I think I have a pretty good handle on how scalar field scattering works in QFT, so now I'm trying to wrap my head...

Mar2012 10:45 PM
Chopin

2 
900 
hi all please help me... I'm learning schrodinger equation of a particle in a 1dimensional box. I read a quantum...

Mar2012 11:23 PM
Chopin

1 
1,129 
Hi all,
Quantum Mechanics has everything wierd and unacceptable to classical theory and its foundations with...

Mar2112 12:21 AM
andresB

24 
2,321 
In quantum mechanics, the Hamilltonian operator is constructed as the infinitesimal generator of the time translation...

Mar2112 02:40 AM
Ilmrak

69 
5,243 
Greetings!!
From my last post, to this my understanding of QM has improved somewhat. (thanks mostly to these...

Mar2112 04:54 AM
genericusrnme

5 
1,213 
I am terribly confused. I have always been hearing that in the hydrogen atom, 2s and 2p orbitals have the same energy....

Mar2112 07:55 AM
Vanadium 50

5 
2,919 
Hi, it's been awhile since taking a quantum mechanics course, but I thought I read somewhere that during an electron...

Mar2112 01:35 PM
jjurbanus

5 
765 
More precisely, my question is, Is the wilson loop used to calculate the heavy quark potential always positive in the...

Mar2212 12:19 AM
sufive

0 
506 
does getting whichway info introduce a phase difference (or cause decoherence) between both the "waves"?
and does...

Mar2212 01:41 AM
genericusrnme

3 
797 
I am trying to understand the following equation:...

Mar2212 02:09 AM
avery

2 
778 
Hello,
For this little discussion I base myself on Bell's paper on Bertlmann's socks:...

Mar2212 05:36 AM
harrylin

97 
8,493 
Dear forumers,
I have a question about taking direct sums and products of state spaces in QM. Picture I have a...

Mar2212 09:52 AM
martinbn

1 
707 
Hey! I am currently reading Landau's Statistical Physics Part 1, and in Paragraph 7 ("Entropy") I am struggling with a...

Mar2212 10:10 AM
marcusl

3 
696 
Considering the strongfield zeeman effect J is no longer conserved because there is an external torque present. Why...

Mar2212 01:10 PM
BramMooij

0 
576 
Well, not really ASAP..
I've just been rereading Sakurais Quantum Mechanics and I'm having some trouble with the...

Mar2212 01:47 PM
genericusrnme

0 
682 
How can the Higgs boson induce mass?
How can it interact with itself? Is it the only particle able to do so, if yes,...

Mar2212 03:32 PM
The_Duck

3 
1,334 
sorry if it is in the wrong place but i just need someone to give me a physical explaination about the meaning and...

Mar2212 04:18 PM
queenstudy

0 
603 
Couple noob questions.
1.What is quantum mechanical definition of an observer?
2.Why is looking at the double...

Mar2212 04:59 PM
JamesOrland

17 
1,512 
I was wondering if trapping a quantum system, say e.g a single β or γ unstable ion in a trap would affect its decay...

Mar2212 05:35 PM
xaratustra

0 
705 
Which material contains highest concentration of free electrons and holes simutaneously
at room temperature and could...

Mar2212 07:34 PM
Stanley514

0 
822 
How would a neutrino act in regards to a black hole? As in approaching, passing by or "colliding" with a black hole?

Mar2212 11:30 PM
alexg

5 
997 
Could anyone tell me where can i find more about the fact that if your Hamiltonian is noncentral then the total...

Mar2312 07:56 AM
cgk

1 
538 
If the positive energy is the capacity to perform work
what about the negative energy?

Mar2312 08:52 AM
Khashishi

2 
860 
Why is it that for the Hatom there is no single photon emission in the transition from 2s to 1s? I realize that...

Mar2312 12:38 PM
Demon117

2 
641 
Zee's QFT in a Nutshell makes a short comment in the first chapter about the possibility of particles tunnelling...

Mar2312 02:43 PM
Bill_K

2 
858 
If a photon is a particle moving like a wave, and the color we see when viewing a stream of photons is determined by...

Mar2312 08:08 PM
francesco85

1 
657 
Hello,
i am a complete ignorant in quantum physics, still from what i have heard i've wondered the following: is it...

Mar2312 10:22 PM
StevieTNZ

3 
889 
I know a fair amount of theoretical Quantum Physics, how things work within it, and the ideas that ground it. I lack,...

Mar2312 10:33 PM
Jolb

4 
899 
Anyone keen on taking a bite at this? I understand what it's about (at least I think so), but I am certainly not...

Mar2412 09:17 AM
jimgraber

1 
741 
the electrical activity of an atom is the same electricity of a light bulb?

Mar2412 03:34 PM
mathman

3 
670 
Hi
In my lecture notes on quantum optics is a reference to a "cnumber" electric field, and it is stated that,...

Mar2412 04:17 PM
Niles

2 
660 
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 
1,290 