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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
1 36,452 It seems an experiment was performed...
Aug27-14 04:14 PM
2 294
How to prove when electron spin is perpendicular to linear momentum, orbital angular momentum can't be 0. And when...
Aug27-14 01:32 PM
Meir Achuz
2 233
Initial assumptions : 1. An unpolarised photon has 50% chance of being transmitted through a linear polariser. 2....
Aug27-14 09:04 AM
38 984
I have been learning some introductory quantum mechanics and stimulated Emission is giving me some problems...
Aug27-14 04:51 AM
1 130
I understand a virtual particle is not technically a particle, but more of a disturbance in a field. I can't seem to...
Aug26-14 05:17 PM
14 441
the only reason i am not sure about the existance of blue-anti blue gluons is because i have never seen them in any of...
Aug26-14 02:29 PM
2 251
A friend who was in Civil Air Patrol once told me he was using some RF Locator equipment and was "homing in" on a...
Aug26-14 01:19 PM
3 129
An M.I.T. Physics lecture mentioned B and E crossing over the x axis as lowest energy state/position of the wave(s). ...
Aug26-14 11:47 AM
5 148
Hey, so today for our quantum physics class we were supposed to go through these identities, |+_x > =...
Aug26-14 07:05 AM
1 280
So I want to get this whole spin/angular magnetism Bohr magneton quantum thing straight. Suppose a diamagnetic sphere...
Aug26-14 02:58 AM
Simon Bridge
3 195
I just started reading the quantum theory.I came across the wave particle duality experiments and just after that the...
Aug26-14 01:48 AM
2 254
In Introduction to QFT (peskin) 4.5, he writes: The computation for M, of course, will be quite different when...
Aug25-14 10:45 PM
3 167
I have a problem concerning gauge invariance in QM. QM should be invariant of electromagnetic gauge. However, the...
Aug25-14 09:52 PM
3 174
At the core of the quantum concept by Planck was the black-body radiation, then: electromagnetic waves, whose...
Aug25-14 05:28 PM
4 275
Raw data sample source: 999 detections parsed in .txt format:...
Aug25-14 04:29 PM
6 249
This thread continues the discussion at
Aug25-14 11:21 AM
23 813
Hi guys, I thought that |psi|^2 was a probability density function and that when integrated over a region this would...
Aug25-14 08:22 AM
23 807
If I had a factory that produces pairs of gloves. And I packed one box with the left glove and another with the...
Aug25-14 07:43 AM
Doc Al
220 3,359
I am trying to understand how a gaussian packet varies in time. Suppose we have a Gaussian wave packet that is...
Aug25-14 04:53 AM
1 186
I have read contrasting things about the issue. Can you explain briefly why the assumption of discrete space and...
Aug25-14 01:52 AM
25 953
Hi all, This is my first post on PF so forgive any rookie errors. I'm a 17 year old British student. I have just...
Aug24-14 05:41 PM
2 234
Just curious what folks think will be the ramifications of this latest finding from the time-symmetric quantum...
Aug23-14 08:34 AM
10 383
Hi everyone. I can not remember if, in 3D, the higher it is the energy level, the higher it is its degeneracy. With...
Aug23-14 08:26 AM
3 249
Hi, I'm relatively new to QM so just a basic explanation of my problem would be amazing! I'm doing some internet...
Aug22-14 06:50 PM
3 174
Hello. From Schwartz QFT BOOK, How could Eqn 5.26 can be Eqn 5.27? d \Pi_{LIPS}=(2 \pi) ^{4} \delta^{4}(\Sigma p)...
Aug22-14 12:51 PM
9 223
Good afternoon : I now what I've written here : in the first...
Aug22-14 12:05 PM
7 303
I got some questions about QM (not well organized) There is wave-particle duality. To my understanding, particle...
Aug21-14 09:43 PM
Simon Bridge
5 268
I got confused when in my book they went from one form of schrodinger equation to another. It doesnt make much sense...
Aug21-14 09:08 PM
2 187
So did anybody have figured out why did OPERA experiment failed?? Does any one know why neutrinos appear to travel...
Aug21-14 07:17 PM
5 278
Hi everyone, Recently I read an introduction to quantum information and got interested to begin a research work on...
Aug21-14 04:36 AM
4 308
As far as I can understand, quantization of a system is to take poisson brackets to commutators. i.e.\{something\}\to....
Aug21-14 03:42 AM
9 410
What is your thought s about quantization and discontinuity in possible?......if yes then How?
Aug21-14 01:31 AM
4 210
Hi, I would appreciate suggestion which chapters from French's "Waves and Vibrations"...
Aug20-14 10:39 PM
13 287
Are lower energy electron orbitals always closer to nucleus than higher energy orbitals? Is this energy proportional...
Aug20-14 09:51 PM
18 634
Is there any difference between Hamiltonian operator and E? Or do we describe H as an operation that is performed over...
Aug20-14 02:03 PM
2 201
Hi, can smart people please assist me with understanding something: why doesn't the "final" observation at the back...
Aug20-14 12:57 PM
7 297
Having just watched Prof Carl Bender's excellent 15 lecture course in mathematical physics on YouTube, the following...
Aug20-14 10:32 AM
0 144
Am I the only one who sees the resemblance between these two identities? Schouten: <p q> <r s> +<p r> <s q>+ <p...
Aug20-14 07:29 AM
0 193
I am referring to the section The Harmonic Oscillator in Griffiths's introductino to quantum mechanics (the older...
Aug20-14 07:12 AM
6 260
Im somewhat new to modern physics, had one introductory class in my university and because it fascinated me so much,...
Aug20-14 06:39 AM
8 948

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