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Quantum Physics

- Mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics & Field Theory
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Feb23-13 08:38 AM
ZapperZ
1 30,365
let there be a system of two electrons and thus have s1=s2=1/2 and m1=m2=+-1/2. the singlet state is: |0,0> =...
Feb24-12 02:08 AM
The_Duck
2 1,227
I'm sure something like this has been posted before but I would appreciate if you humor me. I've been reading the...
Feb24-12 09:08 AM
DrChinese
6 889
Renormalization Group concept is rarely given in laymen book on QM and QFT and even Quantum Gravity book like Lisa...
Feb24-12 07:55 PM
strangerep
47 4,707
Hi,all, I m an undergrades and I am suffering on understanding the different representation transformations, namely...
Feb25-12 07:48 AM
luxiaolei
0 571
Edgardo thanks for posting the links to Bell's Theorem. I read the first one and it was a clear description of Bell's...
Feb25-12 08:43 AM
San K
4 812
Hello everybody, I was revising for my quantum mechanics course and I was wondering why when we approximate the bond...
Feb25-12 09:13 AM
achilleasatha
0 619
when a photon goes through a polarizer, its spin becomes determinate how does it become indeterminate later? ...
Feb25-12 09:14 AM
San K
0 545
Hi i am student from India who has completed his Bsc degree and have applied to few Universities in Europe for Msc in...
Feb25-12 11:04 AM
quantumboy
0 1,680
Greetings chaps, This will probably be old hat to most of you, but I'm beginning to start Quantum mech. so that I...
Feb25-12 11:32 AM
ibazulic
7 915
Hello all, I am having trouble understanding how this works. In Krane there arises a discussion on total angular...
Feb25-12 12:23 PM
Bill_K
1 1,205
Light consist of photons but also has a wave nature which consists of electric and magnetic waves right? So when...
Feb25-12 12:29 PM
juanrga
2 1,317
anybody?
Feb25-12 02:09 PM
Mr_Physicist
7 943
Is it possible to acheive commercially viable nuclear fusion in purely electrostatic quantum tunneling way?What should...
Feb25-12 02:11 PM
cmb
2 1,369
How close do two room temperature deuterium nuclei need to be to each other to have a one-in-a-quintillion chance of...
Feb25-12 02:20 PM
cmb
19 3,907
Since every fundamental particle in the Standard Model should have it's anti-counterpart? Also, after the LHC has...
Feb25-12 02:42 PM
Michio Cuckoo
5 1,267
Do the wave functions for smaller objects disperse faster? How long does a macroscopic wave function (for example...
Feb25-12 05:30 PM
jtbell
1 780
Note the wave function in the Schroedinger Equation has phase freedom from 0 to 360 degrees. Imagine the Mexican...
Feb26-12 07:02 AM
waterfall
0 567
hello there, i've read in several places the following: if you have a polyene with J double bonds, and taking into...
Feb26-12 07:04 AM
sweet springs
5 1,250
I was doing a question while back about finding the de Broglie wavelength of a bullet with a given mass travelling at...
Feb26-12 07:29 AM
ZealScience
3 756
Is it the same as the total angular momentum quantum number ?????
Feb26-12 08:45 AM
Chemist20
2 1,222
hi my question is simple: is there empty space with null energy? thx.
Feb26-12 09:41 AM
avery
2 784
Hi Say I want to describe the interaction between a free atom atom and a classical EM field. The full Hamiltonian...
Feb26-12 01:52 PM
Niles
3 793
Do you consider "photon" as belonging to classical physics or non-classical physics? When Einstein discovered the...
Feb26-12 03:18 PM
Jano L.
5 1,108
We know from classical mechanics that angular momentum L = r \times p depends on your choice of origin. My question...
Feb26-12 04:29 PM
widderjoos
3 1,133
I think I'm trying to reconcile quantum mechanics and special relativity . . . or whatever I'm doing I'm pretty...
Feb26-12 09:09 PM
fhqwgads2005
5 1,313
From what I've gathered reading the scientific literature, the more precise we know a quantum system's position, the...
Feb26-12 10:58 PM
AdrianMay
9 1,084
Two questions regarding decoherence 1) preferred pointer basis: Decoherence explains why a quantum object...
Feb27-12 06:51 AM
A. Neumaier
14 1,782
Hello, I can understand only the basic principle behind quantum entanglement. Do you guys know of the mechanism by...
Feb27-12 08:52 AM
DrChinese
3 1,206
Hi, I know very little about quantum physics so I need some help here, but recently I have seen lots of new agers...
Feb27-12 09:17 AM
BWV
12 2,026
Below are 2 states in the gluon octet. What is the difference between: ...
Feb27-12 01:09 PM
Ben Niehoff
1 792
Hi everybody! I'm studying this paper "Unambiguous discrimination among quantum operations"...
Feb27-12 03:47 PM
provolus
0 893
Last night I started reading the section of Brian Cox's "The Quantum Universe" where they discuss how to calculate the...
Feb27-12 09:23 PM
StevieTNZ
29 2,991
Hello, I was solving the time dependent schrodinger equation in a time-independent potential such that E<V and I...
Feb28-12 12:13 AM
zhermes
1 784
Hi, After some (limited) reading I've written an article on the captioned subject : ...
Feb28-12 12:46 AM
sytstp
5 1,671
Hello there, I was reading an article on wiki about the Breit equation: ...
Feb28-12 04:50 AM
juanrga
3 1,407
Suppose a K.G. field. When I apply the creation operator on the vacuum, how do I know it is a pion or any other boson?
Feb28-12 12:04 PM
intervoxel
3 940
There are tons of interpretations of quantum mechanics, but I'm unaware of any that are 'classical' as in being local,...
Feb28-12 01:41 PM
Xilor
24 1,916
Greetings everyone, I havenít done any quantum in a while, and was reviewing my textbook, Griffiths Ed. 1. The form...
Feb28-12 04:11 PM
HJ Farnsworth
5 1,151
When electrons jump from one shell to another energy has to be released right? Why is only light energy released? Why...
Feb28-12 08:52 PM
questionpost
7 1,432
I am reading about dense coding, and I can't understand which qubit does Alice send to Bob. Her qubit or the shared...
Feb29-12 02:54 AM
calculemus198
0 595

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