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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
30,467 
In quantum field theory do we "describe" static electric fields with proper combinations of transvers propagating...

Apr2312 08:19 PM
Spinnor

5 
1,379 
Can anyone please help me understand this equation and explain it to me?
...

Apr2312 07:34 PM
Mark M

2 
1,005 
http://science.slashdot.org/story/12/04/13/1547242/scientistsfindlongsoughtmajoranaparticle
Is this...

Apr2312 06:39 PM
Bill_K

7 
2,200 
The probability of finding the system in microscopic state i is:
p_{i}=\dfrac{1}{Q}e^{\beta E_{i}}
Where Q is...

Apr2312 04:33 PM
luitzen

2 
2,230 
Please explain if the product of uncertainities related to to the measurement of position and momentum of particle is...

Apr2312 03:24 PM
Fredrik

12 
1,008 
Greetings.
Let's say we have a bound state problem: two micro black holes in orbit around one other. Let us...

Apr2312 01:24 PM
nightbat

8 
1,156 
I'm not exactly sure what it means when my book says that the wave function ψ(x,t) is a probability amplitude of...

Apr2312 01:01 PM
jtbell

8 
1,582 
Hey,
How would you compute the probability of measuring a specific value of an observable (resp. range for...

Apr2312 07:00 AM
Matterwave

1 
498 
If we imagine 2+1 dimensional gravity, I think that this influences on Planck distance and time.
Because attraction...

Apr2212 03:47 PM
exponent137

2 
677 
Have found a Youtube video:
The Reason for Antiparticles: The 1986 Dirac Memorial Lecture
Other than the book of...

Apr2212 01:29 PM
Spinnor

4 
1,373 
Hello !
I had my fair share of quantum mechanics already :) But today I was wondering something, kind of odd I...

Apr2212 12:48 PM
Psi^2

2 
700 
If we have a classical massive complex field in 2D spacetime can we think of it as a 1D membrane which can move in...

Apr2212 12:17 PM
Spinnor

0 
576 
Hi all,
In class Ive recently been taught the schrodinger equation and about spin(couple weeks apart). My...

Apr2212 12:01 AM
jfy4

2 
949 
I was recently studying Feynman's sumoverhistories approach to quantum probability. I also was reading an...

Apr2112 08:43 PM
Matterwave

5 
1,003 
I have been told when a proton and anti proton annihilate only the one up and one anti up quark destroyed forming ∏+...

Apr2112 04:28 PM
Dickfore

2 
850 
New to this area:

Apr2112 01:40 PM
tz1

0 
801 
Let us assume that harmonic oscilator has the lowest energy level equals 0, (and next one \hbar \omega and so on)....

Apr2112 12:19 PM
Dickfore

9 
1,154 
Came across the below experiment, on Wikipedia, but don't understand how it was performed...
It was shown...

Apr2112 04:32 AM
San K

6 
2,483 
...but, is it true that K*T = hv ? Being K Boltzmann constant...and v the frequency.
Because I have seen this...

Apr2112 04:04 AM
Dickfore

1 
686 
My book does not explain this and i cant rly find a simple explanation for this on google and my professor basically...

Apr2112 12:10 AM
KWillets

13 
2,053 
I ve read in many articles that most of the atoms which we see are made initially during big bang..And most of them...

Apr2012 11:41 PM
zonde

7 
1,673 
the energy of rigid rotator is the sum of two energy terms which indicates there are two sources of energy.Can someone...

Apr2012 05:53 PM
Psi^2

2 
621 
Hello all,
how exactly does recombination or ions and free electrons effect dipole movement? I'd love a specific...

Apr2012 04:49 PM
CloudChamber

0 
688 
Does every quantum field have a nonzero groundstate? I understand that the energy ground state is nonzero, due to...

Apr2012 03:28 PM
debra

20 
1,789 
The question (or puzzle) that I want to pose essentially belongs to classical (not quantum) physics. Nevertheless,...

Apr2012 03:13 PM
debra

70 
9,112 
Often in quantum mechanics, there appears statements of the type :
Expected value of operator = a value
I am...

Apr2012 03:40 AM
skiboo

3 
768 
Good morning. I am wondering what is the nature of virtual particle production beyond the event horizon of a black...

Apr1912 04:35 PM
Bill_K

3 
834 
http://www.popsci.com/science/article/201204/firsttimeelectronsareobservedsplittingsmallerquasiparticles
...

Apr1912 02:18 PM
Runner 1

2 
926 
Are there any cases where a particle and its antiparticle have opposite intrinsic parity? I've never seen such a...

Apr1912 01:58 PM
benjammin

0 
898 
Hi all,
I was wondering if anyone could help me with some general rules for which parts one should include in a...

Apr1912 11:49 AM
benjammin

0 
553 
In the twoslit experiment, as I understand it, an interference pattern can be generated by sending many electrons (or...

Apr1912 10:47 AM
dabble

5 
622 
The wave function represents all that can be known about a quantum system, but that usually means that we only know...

Apr1912 09:43 AM
DrChinese

69 
7,786 
I know this topic has been addressed on this forum ad nauseam and please redirect my post if it is posted incorrectly....

Apr1912 07:46 AM
jtbell

4 
891 
We are starting to learn about spin in my introductory quantum mechanics course, and I was wondering if anyone could...

Apr1912 01:02 AM
tom.stoer

5 
1,183 
Hi,
I am reading through Section 3.4 of Lewis Ryder's QFT book, where he makes the statement,
This makes...

Apr1912 12:13 AM
tom.stoer

3 
917 
What are you guy's thoughts on constructing a quantum computer from attosecond doubleslit phenomena?

Apr1812 06:23 PM
channel

3 
2,376 
It is interesting that our elementary fermions have 1/2 spin, meaning it takes a full 720 degree rotation to bring...

Apr1812 05:58 PM
zen loki

9 
1,466 
Hello, why do the electrons with higher quantic number N have more energy than the electrons with lower N if they need...

Apr1812 04:32 PM
Ken G

1 
802 
I like the way quantum mechanics can be expressed as a set of five or six axioms, like in Daniel T. Gillespie's A...

Apr1812 07:34 AM
A. Neumaier

29 
3,453 
Dear physicist,
I designed an experiment for my undergraduate students. As we know, for spin operators, the...

Apr1812 06:37 AM
Bill_K

4 
1,271 