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Feb2313 08:38 AM
ZapperZ

1 
36,452 
http://phys.org/news/201408dualityprinciplesafeapparentviolation.html
It seems an experiment was performed...

Aug2714 04:14 PM
StevieTNZ

2 
294 
How to prove when electron spin is perpendicular to linear momentum, orbital angular momentum can't be 0.
And when...

Aug2714 01:32 PM
Meir Achuz

2 
233 
Initial assumptions :
1. An unpolarised photon has 50% chance of being transmitted through a linear polariser.
2....

Aug2714 09:04 AM
atyy

38 
984 
I have been learning some introductory quantum mechanics and stimulated Emission is giving me some problems...

Aug2714 04:51 AM
vela

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...

Aug2614 05:17 PM
tom.stoer

14 
441 
the only reason i am not sure about the existance of blueanti blue gluons is because i have never seen them in any of...

Aug2614 02:29 PM
samalkhaiat

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...

Aug2614 01:19 PM
jmatejka

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).
...

Aug2614 11:47 AM
WannabeNewton

5 
148 
Hey, so today for our quantum physics class we were supposed to go through these identities,
+_x > =...

Aug2614 07:05 AM
vanhees71

1 
280 
So I want to get this whole spin/angular magnetism Bohr magneton quantum thing straight. Suppose a diamagnetic sphere...

Aug2614 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...

Aug2614 01:48 AM
JohnPrior3

2 
254 
In Introduction to QFT (peskin) 4.5, he writes:
The computation for M, of course, will be quite different when...

Aug2514 10:45 PM
Avodyne

3 
167 
I have a problem concerning gauge invariance in QM.
QM should be invariant of electromagnetic gauge. However, the...

Aug2514 09:52 PM
taishizhiqiu

3 
174 
At the core of the quantum concept by Planck was the blackbody radiation, then: electromagnetic waves, whose...

Aug2514 05:28 PM
kith

4 
275 
Raw data sample source:
http://people.isy.liu.se/jalar/belltiming/
999 detections parsed in .txt format:...

Aug2514 04:29 PM
DaleSpam

6 
249 
This thread continues the discussion at http://www.physicsforums.com/showthread.php?t=767018

Aug2514 11:21 AM
atyy

23 
813 
Hi guys,
I thought that psi^2 was a probability density function and that when integrated over a region this would...

Aug2514 08:22 AM
Demystifier

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...

Aug2514 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...

Aug2514 04:53 AM
bhobba

1 
186 
I have read contrasting things about the issue.
Can you explain briefly why the assumption of discrete space and...

Aug2514 01:52 AM
bobie

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...

Aug2414 05:41 PM
atyy

2 
234 
Just curious what folks think will be the ramifications of this latest finding from the timesymmetric quantum...

Aug2314 08:34 AM
microsansfil

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...

Aug2314 08:26 AM
vabite

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...

Aug2214 06:50 PM
Avodyne

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)...

Aug2214 12:51 PM
WannabeNewton

9 
223 
Good afternoon : I now what I've written here : http://www.physicsforums.com/showthread.php?t=763322 in the first...

Aug2214 12:05 PM
microsansfil

7 
303 
I got some questions about QM (not well organized)
There is waveparticle duality. To my understanding, particle...

Aug2114 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...

Aug2114 09:08 PM
QMechanic

2 
187 
So did anybody have figured out why did OPERA experiment failed?? Does any one know why neutrinos appear to travel...

Aug2114 07:17 PM
berkeman

5 
278 
Hi everyone,
Recently I read an introduction to quantum information and got interested to begin a research work on...

Aug2114 04:36 AM
PaulDirac

4 
308 
As far as I can understand, quantization of a system is to take poisson brackets to commutators. i.e.\{something\}\to....

Aug2114 03:42 AM
rubi

9 
410 
What is your thought s about quantization and discontinuity in physics.......is possible?......if yes then How?

Aug2114 01:31 AM
D.R.U

4 
210 
Hi,
I would appreciate suggestion which chapters from French's "Waves and Vibrations"...

Aug2014 10:39 PM
bhobba

13 
287 
Are lower energy electron orbitals always closer to nucleus than higher energy orbitals? Is this energy proportional...

Aug2014 09:51 PM
DaleSpam

18 
634 
Is there any difference between Hamiltonian operator and E? Or do we describe H as an operation that is performed over...

Aug2014 02:03 PM
Orodruin

2 
201 
Hi, can smart people please assist me with understanding something: why doesn't the "final" observation at the back...

Aug2014 12:57 PM
Nugatory

7 
297 
Having just watched Prof Carl Bender's excellent 15 lecture course in mathematical physics on YouTube, the following...

Aug2014 10:32 AM
qtm912

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...

Aug2014 07:29 AM
MathematicalPhysicist

0 
193 
I am referring to the section The Harmonic Oscillator in Griffiths's introductino to quantum mechanics (the older...

Aug2014 07:12 AM
stevendaryl

6 
260 
Im somewhat new to modern physics, had one introductory class in my university and because it fascinated me so much,...

Aug2014 06:39 AM
bhobba

8 
948 