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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 35,285
Dear all, I'd be very grateful for some help on this question: "The momentum operator is defined by: \displaystyle...
May21-08 02:38 PM
4 1,365
Casimir force increases when you put 2 plates closer and closer... But where is a limit? Obviously, Casimir...
Jan5-09 08:56 AM
4 1,365
Reading about the double slit experiment in Six Easy Pieces I came across something I had questions about, which is...
Aug4-05 11:06 PM
8 1,364
I'm trying to come up with a computer algorithm to enumerate the basis states of the Holstein model (electron phonon...
Jun11-07 04:07 PM
0 1,364
I recently read an article in Scientific American by Thomas Roman and Lawrence Ford in which they concluded that the...
Jan27-08 10:54 PM
0 1,364
Suppose we have a particle in a 1-dimensional box, such that the particle is in its lowest energy state. The energy...
Jun9-08 07:04 AM
2 1,364
Hi, it's my first time to post here. I'm wondering how we can define "entanglement" for identical particles. ...
Feb20-09 02:14 AM
1 1,364
perhaps is a dumb quetion but, given a IR divergent integral (diverges whenever x tends to 0) \int_{0}^{\infty}...
Apr11-09 01:01 PM
Vanadium 50
5 1,364
What exactly are quantum numbers? I read the Wikipedia page on them but it is just way to complicated for me.
Feb4-10 03:21 AM
3 1,364
Hello dear readers, I have a problem. I'm giving a lecture tomorrow on the EPR experiment and Bell's theorem and so...
Jun29-12 05:29 AM
13 1,364
If I understand it, photons on the event horizon of a black hole can go over the speed of light by the plank constant....
Jan11-05 09:37 PM
4 1,363
These are probably old ideas (or, perhaps, just stupid), but recently thinking about non-locality it seemed to me that...
Jan11-06 09:59 AM
4 1,363
A while ago I was watching this video on queantom physics and this dude was talking about the Theory of unification...
Aug23-06 06:05 PM
4 1,363
surfing the web and arxiv i found the strange formula lnA= \frac{d^{n}}{ds^{n}} \frac{s^{n-1}}{n! A^{s}} my...
Jun17-08 12:11 PM
4 1,363
Which QM interpretation (Bohm, Copenhagen, MWI) best supports the resolution of Hardy's Paradox?
Jul27-09 05:35 AM
8 1,363
Hi, I need to read up on Bra/Ket notation for my project on Bells Inequalities. I've been through the relevant...
Nov14-09 05:16 PM
1 1,363
If I take a linear combination of the first two eigenstates of the harmonic oscillator and use it in the potential of...
Dec28-09 10:59 AM
0 1,363
Hi This is quoted from "Popular belief (even among most physicists) holds that phenomena such as radioactive...
Jul2-10 12:39 AM
3 1,363
Since my ability to respond to articles was messed up by someone and I have been unable to get any help straightening...
Jan24-11 10:00 PM
10 1,363
Hi,I need to write some suitable transformation matrix that takes from the diagonal(i.e.45 degree)basis to the...
Jan30-11 08:35 PM
0 1,363
(modified this to reflect a better understanding) Stationary solutions to the wave equation mean that if I...
Nov5-03 12:36 AM
3 1,362
Consider the usual 1D quantum harmonic oscillator with the typical hamiltonian in P and X and with the usual ladder...
Sep19-11 05:07 AM
4 1,362
The uncertainty principle states that you can never know with any accuracy the precise position and velocity of a...
Feb27-05 09:56 AM
5 1,362
why |a><b| expresses the can it be possible on matrix..if we multiply a ket a with a bra b ...we get...
Jan27-09 10:48 AM
7 1,362
I know this is a hotly debated subject here, but what is the general scientific consensus (or most popular definiton)...
Sep8-09 10:06 AM
7 1,362
Recently the NIST group demonstrated a two qubit programmable quantum computer, And...
Feb6-10 07:35 PM
6 1,362
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 1,362
In QM, particles are treated as either waves or particles, a duality exists. A test particle in freefall is used in...
Jun22-04 05:14 AM
4 1,361
Amateur level. Popular Science books usually start describing the double-slit experiment in terms of waves, by...
Jul24-05 05:27 PM
4 1,361
A friend of mine wrote a paper on entanglement, measurement, and simultaneity. the professor provided an...
Mar29-07 12:25 AM
George Jones
5 1,361
Hi everyone, Can any body solve my simple problems of quantum: Usually we say, that wave function Ψ is dependent on...
Jun13-08 04:25 PM
2 1,361
Hello everyone! I want to study QFT and I want to know all of the required mathematics for it. I know most of...
Dec9-11 11:47 AM
4 1,361
As a result of some precise experimental data, we now know that the mass of the quark is not naively 1/3 the mass of...
Jul3-13 01:39 PM
17 1,360
Let's suppose we have in perturbation theory the quantities (m_0 , q_0 , G_0 (x,s)) With m,q, and G(x,s) the...
Apr24-07 02:32 AM
2 1,360
A stupid couple of questions... In quantum computations, one typically starts with some initial quantum state on...
Mar3-08 07:22 PM
2 1,360
if we consider the propagators and other Fourier integrals in the sense of 'distribution' then are all the divergences...
Nov13-08 04:11 PM
2 1,360
I've been reading about it various places online, but I can't seem to find a straight answer. Is information lost...
Sep13-11 06:29 AM
11 1,360
Of course that,s setting s=it inside Schroedinguer equation you get the Heat equation..and the same for...
Apr2-06 05:04 AM
0 1,359
Have we been able to come up w/ a technology that can change a matter into energy or vise versa?
Jul24-06 11:07 AM
6 1,359
A single stationary electron's magnetic flux caused by it's spin gives it a north and south pole right? does that mean...
Nov10-06 08:28 PM
5 1,359

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