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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 36,811
My question concerns the orbitals in the atom (s,p,d, and f.) I know that each orbital shell is a probability density...
Apr4-09 03:04 PM
Quantom
8 1,065
This question is something that's been bothering me for a long time, there has to be a probability in this universe...
Aug18-09 12:38 AM
Quantom
2 769
can anyone please explain in detail what the quantum theory is and how it is different from normal physics?
Dec16-08 01:03 AM
malawi_glenn
5 782
When something is frozen fully, and the temperature is absolute zero -there is no entropy - but does that mean the...
Apr27-11 09:51 AM
ZapperZ
8 2,080
Hello! I'm having trouble understanding some of the terminology used to describe Misner (or Milne) Space. Some of the...
Sep1-09 06:35 AM
tiny-tim
1 1,751
If using spherical coordinates (r, theta, phi) , what is the meaning of the canonical momentum of theta, phi? What are...
Nov29-06 12:17 PM
StatMechGuy
3 5,999
What is the definition of ionization? For example, in the case of Hydrogen atom, the Coulomb force is the long-range,...
Dec13-06 07:28 AM
ZapperZ
23 8,594
I thought Statistical Interpretation of quantum mechanics is a very good alternative besides the orthodox...
Dec12-06 02:37 PM
Anonym
49 5,207
Could anyone tell me what complex scaling is? Do the eigenfunctions of the complex scaled Hamiltonian form a...
Dec14-06 10:36 AM
Georgie Cartier
1 2,374
Particle-Wave duality and Hamilton-Jacobi equation According to Particle-Wave duality, an observer can't describe a...
Feb4-07 03:35 PM
Anonym
75 8,956
I am just learning QED and could not understand the role of wave function. Is the basic equation in QED the...
Feb13-07 05:08 PM
Anonym
67 9,450
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 3,700
In Bohr model of Hydrogen, the electron will not slowly lose energy as they travel, and hence will remain in stable,...
Jan31-10 06:38 PM
bobydbcn
10 3,937
What is the meaning of temperature in a quantum system? Surely temperature concerns lots of particles. (More is...
Jan26-07 10:00 AM
Anonym
2 1,205
I am confused about the relation between condensed matter physics and Quantum field theory (QFT). Here are my "naive"...
Jan26-07 05:05 AM
Quantum River
0 3,389
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
0 975
How does category theory apply in physics?
May16-07 11:30 AM
quantum123
0 829
What is the classical analog for l=0 state? Angular momentum = 0 , what kind of orbits is that?
Aug22-12 01:40 AM
DrDu
6 749
I was wondering what caused the observed effect of this experiment?
Jun6-06 05:45 PM
Quantum1332
0 720
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 1,276
Observing entangled particle not change partners state or states, only break correlation between the two. Many...
Jan25-09 07:28 AM
QuantumBend
0 936
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 1,889
(The following is a purely qualitative consideration of Quantum Mechanics) In a particular Quantum Mechanics text,...
Mar28-13 02:17 PM
QuantumBunnii
4 684
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 10,926
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 31,208
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
7 526
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 1,039
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
1 777
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 1,003
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
3 974
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
0 796
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 1,134
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
1 957
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 2,212
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 1,467
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 1,035
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 2,492
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 1,856
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 2,741
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 1,351

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