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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 34,432
I thought Statistical Interpretation of quantum mechanics is a very good alternative besides the orthodox...
Dec12-06 02:37 PM
Anonym
49 5,056
According to Prof. Sir M. Berry's argument, the Quantum Mechanics transition to Classical Mechanics (when the Planck...
Oct1-07 05:05 AM
Demystifier
12 3,623
Hi, everyone! I'm desperately trying to understand the "Adiabatic" Quantum Computing. I have papers but I need...
Oct20-04 11:17 AM
quantum-m
0 955
How does category theory apply in physics?
May16-07 11:30 AM
quantum123
0 815
What is the classical analog for l=0 state? Angular momentum = 0 , what kind of orbits is that?
Aug22-12 01:40 AM
DrDu
6 733
I was wondering what caused the observed effect of this experiment?
Jun6-06 05:45 PM
Quantum1332
0 703
Hi, I should start off by saying that I am not physicist, nor am I a physics student, however I have lately been in...
Oct21-12 05:35 PM
rocket123456
8 1,217
Observing entangled particle not change partners state or states, only break correlation between the two. Many...
Jan25-09 07:28 AM
QuantumBend
0 921
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 1,818
(The following is a purely qualitative consideration of Quantum Mechanics) In a particular Quantum Mechanics text,...
Mar28-13 02:17 PM
QuantumBunnii
4 665
If no human has observed the moon or been able to calculate its existence through studying its physical effects.......
Feb2-06 11:33 AM
quantumcarl
96 10,834
Can anyone please tell me what energy is made of? If this is a really bad question please feel free to eliminate this...
May23-06 08:36 AM
Doc Al
36 30,620
I'm currently doing my Bachelor's in Physics(1st year). My textbooks aren't too clear on quantum mechanical concepts....
Jun9-14 11:41 AM
quantumcat
7 488
The Hamilton-Jacobi equation \frac{\partial W}{\partial t}+\frac{1}{2m}\left + V(x,y,z) = 0 It is said that this...
Feb21-11 05:25 AM
QuantumClue
4 983
I begin with \int (\bar{\psi}(x) (\mathcal{H} \psi(x)) d^3x This is just \int (\bar{\psi}(x) ({\frac{p^2}{2M} +...
Feb24-11 08:20 PM
QuantumClue
1 762
I have heard that quantized gravitational charge is given by \mu_q= \sqrt{GM}. Sean Carrol seems to define...
Mar1-11 08:38 AM
jtbell
6 984
The g-factor is related to the magnetic moment by our universal equation \mu= g \mu_B S/ \hbar and the magnetic moment...
Mar11-11 12:57 PM
RedX
3 936
Hi, I was wondering why the oscillation of a field would cause particle creation (This seems to be the main point...
Dec19-10 09:03 AM
QuantumCosmo
0 782
Hi, I was wondering: What is the physical reason for only choosing linear operators to represent observables?
Apr1-11 08:19 AM
A. Neumaier
5 1,078
Hi, I am currently learning for a test in theoretical physics and in one of my books it was mentioned that there is a...
Apr2-11 08:10 AM
Bill_K
1 930
Hi, I was wondering if the bound solutions to the radial part of the hydrogen atom form a complete set for the...
May23-11 02:00 PM
dextercioby
15 2,126
Hi, I was wondering if the spin of a particle changed under Lorentz boosts. I think what it comes down to is if S^2...
May9-11 01:28 PM
Bill_K
2 1,432
Hello im a second year physics undergrad and I am still in the intro classes. I was wondering if someone could explain...
Nov16-04 06:43 AM
dextercioby
5 1,021
Hello everyone, I wanted to ask you if you could recommend some, in your mind, excellent books( That every physicist...
Nov18-04 03:05 AM
humanino
8 2,307
Hello, I was wondering if anybody could lead me to some online reading about Quantum Mechanics and its history? Thanks.
Dec21-04 01:05 AM
Eye_in_the_Sky
1 1,796
What I mean is, how do we know Quantum Mechanics is not some real good approximation to an even better theory about...
Aug27-05 10:11 AM
tavi_boada
24 2,683
Hello everyone, I am in my Undergraduate Quantum Mechanics class right now and it has been great fun...
Oct20-06 08:26 PM
CarlB
3 1,325
It is said that so called tadpole graph gets eliminated from perturbation expansion if the normal-ordered interaction...
May13-09 02:27 PM
loopist
4 2,813
Can some explain me why first order term in perturbation expansion of scattering matrix gives no contribution for...
Nov26-07 05:56 PM
QuantumDevil
3 1,459
In some QFT books it is written that the generating functional Z=\int \mathcal{D}\phi e^{i\int...
Dec25-07 08:59 AM
QuantumDevil
8 2,060
Have multi-particle state of full Hamiltonian and one-particle state of free Hamiltonian non-zero scalar product?...
Dec28-07 04:18 PM
strangerep
5 3,046
1. Are there possible (4th order)process of "decay of photon" \gamma\rightarrow 3 \gamma with one-photon initial state...
Mar12-08 11:56 AM
reilly
2 1,010
Hi all, I have posted a question in the Homework help section, but it doesn't seem like anyone is able to help. I am...
Apr18-09 07:48 AM
quantumdude10
0 823
Hi, Can someone explain to me how a particle can exist in \Psi(l=0, s= 3/2).
May21-09 11:43 AM
granpa
3 1,052
As the poll on this forum from 2011 that has recently been resurrected shows, there are a portion of the users here...
Jul5-12 09:12 AM
pm97112
7 1,858
So there's some potentially quite interesting news circulating: ...
Nov19-12 09:44 PM
StevieTNZ
1 907
but im confused how do you proof that the dirac field describes spin half quanta when quantized??? plz refer me to...
Nov13-07 07:22 PM
quantumfireball
7 1,656
What does it really mean to integrate over all possible fields in the Path integral formulation of quantum field...
Nov26-07 04:17 AM
Demystifier
4 1,621
"I remember that when someone had started to teach me about creation and annihilation operators, that this operator...
Nov20-07 04:52 AM
quantumfireball
4 1,310
Are the W+,W- and Z0 the field quanta of the massive charged vector fields????????? ie Proca fields
Jan8-08 11:58 PM
quantumfireball
12 1,936

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