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Quantum Physics

- Mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics & Field Theory
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:38 AM
ZapperZ
1 35,385
Just something I was wondering about Schrödenger's cat. According to Schrödenger's cat, wether the cat is alive or...
Jun13-12 07:07 PM
fissile_mop
6 1,335
What is "Magnetic flux quanta"? is there any animation describing this subject?
Jun13-12 01:03 PM
mnada
2 720
The wavefunction is defined on the domain of complex numbers. To find the probability of discovering a particle in a...
Jun13-12 10:23 AM
Demystifier
1 445
I'm definitely messing up somewhere :P The Larmor Equation is \Delta H = \frac{2\mu}{\hbar Mc^2 e}...
Jun13-12 10:07 AM
Meselwulf
2 532
Hi folks, I've been reading into the concepts of chirality & helicity and often I find a statement that chirality...
Jun13-12 08:38 AM
Eruvaer
4 1,025
How was Pauli exclusion principle derived ? Experimental ? From some other physical formula ? Which ? From some...
Jun13-12 04:13 AM
Simon Bridge
1 842
i know you can use dE/dp = p/m = dw/dk but what happens when you throw a potential so you have E = p^2/2m + V,...
Jun12-12 09:57 PM
silence11
0 537
can a particle/photon be quantum entangled on more than one property/factor? (at the same time-- redundant...
Jun12-12 09:39 PM
lugita15
5 766
I don't know much about brackets and Hamiltonians, but there is a much simpler aspect of the time / energy uncertainty...
Jun12-12 01:46 PM
professorscot
0 561
ΔxΔp ≥ \frac{h}{4\pi} Since Δx=ct for a photon and Δp=(mv_{f}-mv_{i}) Then ct(mv_{f}-mv_{i}) ≥ \frac{h}{4\pi} ...
Jun12-12 12:59 PM
professorscot
8 1,331
I know MRIs. It seems that cell phone towers use superconductivity. What are some others?
Jun12-12 11:49 AM
Duplex
32 11,969
I know in classical physics we calculate the energy based on the Amplitude. I also know we calculate the energy in QM...
Jun12-12 09:20 AM
haael
3 1,369
we know as per uncertainity, (px-xp)>=h/4(pie)...ie can px-xp take any value which is more than h/(4(pie))..can it be...
Jun12-12 08:58 AM
haael
9 915
Hello there, I have to do an essay for my university class, and want to use virtual particles (or virtual...
Jun12-12 06:07 AM
tiny-tim
1 649
Hi I'm studying for my course of quantum chemistry and I have some issues with applying the Hückel or thight...
Jun11-12 07:54 PM
JorisL
2 1,283
Matter (deBroglie) waves is a concept and it's existence is not confirmed (?)..that said, We know that - The de...
Jun11-12 12:44 PM
Simon Bridge
3 877
<deleted>
Jun10-12 08:06 PM
robertjford80
0 771
In the fabric of the Cosmos by Brian Greene there is an experiment using the example of Mulder and Scully and boxes....
Jun10-12 04:00 PM
Ken G
4 1,135
Two spherically symmetric potentials, the Coulomb potential and the isotropic harmonic oscillator potential, lead to...
Jun10-12 04:58 AM
A. Neumaier
17 2,747
I have read that when 2 Hydrogen atoms come together their individual spacial wavefunctions overlap in the following...
Jun10-12 03:44 AM
cgk
1 991
how does/would LHV (local hidden variables) theory explain the phenomena of: 1. quantum entanglement swapping...
Jun10-12 01:10 AM
San K
3 1,054
If we were to introduced a set of un-entangled, but same polarized, photons as control experiment what would the...
Jun9-12 11:58 PM
lugita15
3 963
hello. it's the first time I use this site I hope that I find the answer of my question: does the hausdorff formula...
Jun9-12 11:52 PM
strangerep
2 1,000
Hi all, I have recently been reading the book ``The Method of Second Quantization'' by Felix Berezin but I got trapped...
Jun9-12 11:26 PM
strangerep
1 852
We often just say that the eigenvalues of \hat{L}^2 are \hbar^2l(l+1), but does this apply to all kinds of potentials...
Jun9-12 03:47 PM
fzero
2 798
Schrödinger had proved/predicted QE theoretically prior to experimental (though not loop-hole free) verification. ...
Jun9-12 07:09 AM
Simon Bridge
1 745
The general evolution of a ket |\psi\rangle is according to -i\hbar\frac{d}{dt}|\psi\rangle=H|\psi\rangle without...
Jun9-12 06:59 AM
youngurlee
7 1,276
why is the function must be normalize ? what is the meaning of normalization I know it's ∫ψψ*=1 but what it...
Jun9-12 02:02 AM
sciboudy
3 709
I am interested in knowing that in QM what vector/tensor operators are? In fact how do they differ from scalar...
Jun8-12 04:41 PM
Bill_K
3 740
Electrons paired up in an orbital have anti-parallel spins. One rotates in clockwise direction and the other in...
Jun8-12 03:13 PM
Naty1
4 1,016
Hi, Have there been done variations of double slit experiment, particularly I'm interested in following scenarios:...
Jun8-12 01:05 PM
Simon Bridge
3 820
In the experiments done with superconducting rings by Delft and Stony Brook, currents are shown to be moving in both...
Jun8-12 04:22 AM
Dadface
63 6,602
Hi! I'am young and am very excited about Physics. I would like to read the research papers written by famous...
Jun8-12 02:33 AM
M Quack
3 1,162
Hello, not sure if I'm typing the question in the right place, but I encountered this question when going through...
Jun7-12 03:55 PM
Bill_K
5 1,095
I am having troubles finding anything online that reveals the conceptual concerns relating to the probability...
Jun7-12 02:39 PM
James S Saint
18 2,151
First time poster, more of a nerd than an academic. So virtual particles, can they pop into and out of existence...
Jun7-12 12:20 PM
FrY-Yau
5 874
Quantum field theory predicts a value for the cosmological constant that is 123 orders of magnitude larger than the...
Jun7-12 08:10 AM
Sonderval
9 1,838
I have some questions concerning the first two chapters of Ginsparg's text on CFT, which can be found here 1. In...
Jun6-12 05:39 PM
physicus
4 1,251
Okay so this is my first post after like 15 min of tying to figure out how to post. Anyways I have been reading about...
Jun6-12 11:39 AM
juzzy
4 1,042
The empirical method of linear combination of atomic orbitals is not hard to understand. There is one thing about this...
Jun6-12 06:21 AM
Ken G
4 726

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