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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
35,521 
My mathematical knowledge of QFT is nonexistant (I'm only just starting grad school) so I was wondering if anyone...

Jun1708 05:45 PM
f95toli

6 
1,597 
In my readings, I keep seeing what people refer to as a particle "borrowing" or "loaning" energy, and quickly giving...

Jun1708 04:46 PM
lzkelley

1 
2,155 
surfing the web and arxiv i found the strange formula
lnA= \frac{d^{n}}{ds^{n}} \frac{s^{n1}}{n! A^{s}}
my...

Jun1708 12:11 PM
lbrits

4 
1,365 
Hi, I was just wondering if heisenbergs uncertainty principal is about position and velocity (or energy and time),.....

Jun1608 11:04 AM
pmb_phy

3 
1,641 
I learned about this in class and some parts have been bugging me for a while. I am to understand that because were...

Jun1608 10:09 AM
pmb_phy

35 
5,095 
Ok, I've been taught this stuff in school about the particle/wave duality. And what's been always bugging me is that...

Jun1608 08:38 AM
pmb_phy

9 
1,446 
I'm trying to understand what Braket state vectors are... and I'm not sure if I completely understand what's going on....

Jun1608 08:29 AM
pmb_phy

12 
3,196 
Hi, I have a problem identifying some 3d rotation matrices. Actually I don't know if the result can be brought on the...

Jun1608 05:46 AM
schieghoven

2 
1,403 
Does the uncertainty principle contradict the idea that an object can be at rest relative to an observer? For...

Jun1508 12:06 PM
ZapperZ

38 
3,677 
Here's something that I recently thought about:
If we assume a Doppler shifted EM wave retains the amplitude of the...

Jun1508 06:58 AM
clem

5 
2,056 
.
hi everyone here ,
i have a problem about the exhange energy .
IN quantum mechanics, there is a example how to...

Jun1508 04:01 AM
njuxyh

0 
1,188 
Okay, so here's my knowledge of quantum mechanics: *crickets chirping in the background*. Here's my mathematical...

Jun1508 12:58 AM
vanesch

6 
1,275 
Hi all,
suppose i want to calculate the propagator/transition amplitude which i can write as follows:
...

Jun1408 07:03 PM
lbrits

5 
1,577 
Particle energy and momentum are obtained from the wave function as eigenfunctions of the spatial and time derivative...

Jun1408 06:23 PM
TriTertButoxy

7 
2,286 
I keep hearing about renormalization in quantum mechanics, frequently in the context of it's mathematical dubiousness....

Jun1408 03:02 PM
QuantumDevil

6 
2,594 
Some questions about frequency, doppler effect, and mass.
What exactly is frequency? I know its an intrinsic...

Jun1408 03:15 AM
Overmind

3 
1,013 
Hello everybody, I have few queries in Quantum.Can anybody tell me:
1.) Ladder operators are very well defined as...

Jun1408 03:12 AM
ismaili

5 
4,600 
Hi there, we were just introdued to the concept of plancks theories and his constant and I was just wondering hat...

Jun1408 12:55 AM
rbj

20 
9,113 
Hi everyone, Can any body solve my simple problems of quantum:
Usually we say, that wave function Ψ is dependent on...

Jun1308 04:25 PM
Fredrik

2 
1,380 
There are lots of works on the hidden variable.
How about the theory recently?
Thank you!

Jun1308 03:01 PM
DrChinese

2 
1,404 
Hi,
After actually struggling to find anything relevant in books/google/this forum I'd really appreciate if someone...

Jun1308 08:52 AM
lbrits

2 
1,237 
Hey
IR radiation excites vibrational motion in molecules. so that the matter gets hotter. But what about electronic...

Jun1308 07:55 AM
evidenso

0 
1,934 
I'm still in Intro Physics, and I'm a little perplexed by the concept of tunneling. An alpha particle escapes the...

Jun1308 07:34 AM
malawi_glenn

3 
2,019 
Homework Question:
"Explain why the following is incorrect.A duck lives in a faroff planet where Planck's constant h...

Jun1308 06:42 AM
kensaurus

0 
1,505 
Hello,
I was sent this email of a really interesting postcard that has this really long equation on. However, the...

Jun1208 05:37 PM
mgb_phys

2 
1,321 
Hi,
I'm trying to prove the theorem found in the following scan of Coleman's Aspects of Symmetry.
So far, I have...

Jun1208 03:23 PM
omg!

7 
2,013 
It seems physicists have come to the conclusion that a single electron travels through both slits at the same time,...

Jun1208 01:10 PM
birulami

10 
3,112 
When examining the Schrodinger equation for a particle in a square well there is a lower case “i” that shows up in the...

Jun1208 12:42 PM
Fredrik

9 
5,688 
If I came up with a theory that had predictions 100 times larger or smaller than experimental observation my theory...

Jun1208 09:30 AM
Fredrik

3 
2,241 
Hello Everyone,
This time I want to share with you my experience with the book the Interpretation of Quantum...

Jun1208 09:17 AM
Fredrik

1 
2,117 
Initially I want to let everyone know that I came across these forums recently after searching for further information...

Jun1108 08:38 PM
lbrits

2 
1,387 
'Electron Waves' is something I heard of in my 9th or 10th standard, and fooled around in 12th standard. But the thing...

Jun1108 04:20 PM
f95toli

10 
1,756 
When i learned the capacitor in electricity, we didn't care about the photoelectric.
But now after some quantum...

Jun1108 03:31 PM
kthouz

0 
1,188 
In the SternGerlach experiement, what's so special about the magnetic field that causes the electrons to behave like...

Jun1108 01:37 PM
TheRealColbert

6 
2,452 
We are discussing the Demystifier's paper "Quantum mechanics: myths and facts"....

Jun1108 08:41 AM
Count Iblis

69 
11,851 
Why did Schrodinger call his equation eigenvalue problem?
We can solve Schrodinger equation since it's just...

Jun1108 02:11 AM
mito

2 
4,990 
Hi,
I am trying to calculate the time evolution of a density matrix. Like if there is a mixed state with 50% of x,...

Jun1008 06:47 PM
Count Iblis

1 
1,974 
How "Quantum Entanglement" happens?!
As far as i know, it's one subatomic particle (i.e. electron) sendig data to...

Jun1008 02:12 PM
ZapperZ

9 
3,549 
Hi everyone, first of all let me state I'm no expert in quantum physics. But I'd be glad if any of you would just...

Jun1008 01:36 PM
maverick_starstrider

6 
1,752 
Two months ago, I talked with an old foreign professor about the nonlocal hidden variable. He was very interested in...

Jun1008 12:34 PM
Crosson

3 
921 