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Feb2313 08:38 AM
ZapperZ

1 
34,148 
Hello,
Interested mostlyamateur here with some questions about the Quantum erasure with causally disconnected...

Jun1414 04:54 PM
rkastner

2 
261 
Goodafternoon everyone,
I am looking to the RayleighJeans law derivation. In order to calculare the average energy...

Jun1414 03:18 PM
vabite

4 
257 
I believe I understand the mathematical derivation of the Dirac equation. I understand how the four 4X4 matrices, and...

Jun1314 12:12 PM
referframe

11 
483 
Let's say I have an anharmonic 1D oscillator that has the hamiltonian
##H=\frac{p^2}{2m}+\frac{1}{2}kx^2+\lambda...

Jun1314 06:43 AM
stevendaryl

3 
298 
Hello,
I am reading the book, The Quantum Theory of Fields II by Weinberg.
In page 426 of this book (about...

Jun1214 11:15 PM
wphysics

2 
293 
in an energy level of atom, electron can be found here or there by chance. I presume that the location electron can be...

Jun1214 09:54 PM
bhobba

2 
211 
What is the "A" in the wave equation: Ae^{i(kxwt)}? What does it mean in quantum mechanics? Is it just the amplitude?

Jun1214 09:26 PM
bhobba

2 
266 
What would happen if the double slit experiment were to be undertaken using white light, and one of the slits was...

Jun1214 08:06 PM
bhobba

5 
253 
I am just getting into quantum after a long absence of working on modern physics. I am having a go at "Introduction...

Jun1214 11:34 AM
kq6up

10 
346 
This question was on Stackexchange, and no one was able to solve it. So now I'm posting it here, and I wish someone...

Jun1214 08:04 AM
TheDestroyer

6 
306 
Hi Everyone
I have four questions about the nature of quantum superposition and wave functions:
1. If a particle...

Jun1214 02:13 AM
DrClaude

11 
375 
Maybe someone here can explain me something I never understood in QM: The wave function lives in the Hilbert space...

Jun1114 03:50 PM
Tosh5457

8 
414 
Hi Everyone
This is a question which, in various forms has been asked in various places on the Internet but I have...

Jun1114 03:24 PM
mfb

20 
1,359 
Hi,
Assume I’m solving a 2particle (fermions) problem in a potential well. If I set the wavefunction as...

Jun1114 07:12 AM
DrClaude

3 
194 
Hi all,
I know how if a statistical partition function is written as a path integral in imaginary time (Wick's...

Jun1114 01:24 AM
king vitamin

19 
498 
After reading an article on Planck length, I began to wonder whether or not the theoretical limit implied that...

Jun1014 09:09 PM
bhobba

6 
300 
I never heard of the CSHS Inequality until I read it in another thread.
The other interesting item was this:
I...

Jun1014 08:40 PM
.Scott

1 
177 
In quantum mechanics, in a stationary eigenstate of Hamiltonian, simultaneous recognition of to change and being...

Jun1014 06:42 PM
bhobba

13 
572 
Although the subject line might seem to put this question inside general relativity, the reason I put it in quantum...

Jun1014 01:17 AM
nomadreid

2 
286 
So many different experiments, so many variations, so many versions of interpretations and storytelling abstractions....

Jun914 05:01 PM
micromass

70 
1,644 
I'm currently doing my Bachelor's in Physics(1st year). My textbooks aren't too clear on quantum mechanical concepts....

Jun914 11:41 AM
quantumcat

7 
487 
Now I'm trying to imagine the wavefuction before and after collapse when measured at either slit. Before the particle...

Jun914 09:19 AM
bhobba

2 
217 
I'm revising for my introductory particle physics exam and I've noticed SU(3) pop up a few times, it was never really...

Jun914 08:21 AM
PhilDSP

4 
290 
On page 13 of Griffith's "Introduction to Quantum Mechanics 2nd ed" David goes into a long (relatively speaking) proof...

Jun914 06:52 AM
stevendaryl

4 
318 
When in a sterngerlach electrons are not detected the two beams can merge behind. We just have to add the amplitudes....

Jun914 05:54 AM
kith

1 
217 
What is the fundamental reason why the allowed energies of electrons are quantized? I did some research on the web...

Jun914 05:31 AM
hilbert2

1 
255 
Hi, there
Today, a friend came to me and asked the following questions and they made me confused.
If the source is...

Jun814 09:17 PM
Robert_G

5 
332 
Why is quantum physics needed to explain photosynthesis?
In what aspect does the corresponding classical theories...

Jun814 11:23 AM
HeavyMetal

2 
261 
Hey!
I did an quantum mechanical analysis of a Hydrogen Atom in a homogeneous magnetic vector potential (I know...

Jun814 11:00 AM
Vanadium 50

6 
297 
I'm a bit of a nonclassical physics newbie here, so let me check my (rudimentary) understanding of some things first....

Jun814 10:10 AM
mfb

6 
370 
Hello and apologies if the title of the question is not very precise.
Question: I am reading the document talking...

Jun814 09:07 AM
UltrafastPED

1 
135 
This is a question about The Computational Capacity of the Universe by Seth Lloyd.
It seems to me that arbitrary...

Jun714 11:57 PM
bhobba

3 
233 
I am referring to an experiment mentioned in Quantum Entanglement lecture:...

Jun714 10:51 AM
RobikShrestha

6 
281 
this might be a dumb question, but, if spacetime isn't a field and gravity is a property of spacetime. then gravity...

Jun714 03:35 AM
bloby

7 
443 
Sometimes it happens that hamiltonian has degenerate eigenvalue. This degeneracy can be removed by modifying the...

Jun714 03:32 AM
Jano L.

8 
310 
If I understand it, Hilbert spaces can be finite (e.g., for spin of a particle), countably infinite (e.g., for a...

Jun614 02:11 PM
samalkhaiat

35 
1,109 
Two entangled photons from a samepolarization source have their polarization measured at 120 deg difference from each...

Jun614 09:17 AM
DrChinese

1 
236 
This post is my reply to a blog comment by billschnieder, since I do not think it is wise to start a discussion in the...

Jun614 06:54 AM
georgir

0 
259 
I have a question: can the mechanism behind Pauli's exclusion principle be considered a fundamental force, like...

Jun614 06:35 AM
tom.stoer

9 
407 
Hello everyone. I was yesterday asked in an interview to draw a gaussian curve. I drew. And then they asked in what...

Jun614 06:18 AM
suvendu

8 
277 