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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
36,813 
I know that the Sun radiates vast amounts of energy partly due to nuclear fusion. I've also heard that nuclear fusion...

Aug113 05:04 PM
Positron137

8 
1,344 
I am reading David Griffiths' book on Quantum Mechanics, and he usually says that the general solution to the TDSE,...

Aug613 04:13 PM
Positron137

4 
593 
I have a question: is there any way to accurately "visualize" the phenomenon of electron degeneracy pressure? I...

Oct1413 09:02 AM
Positron137

2 
1,626 
hi,if someone work in quantum gravity exactly in bohmienne quantum gravity then help me with documentations in the...

Mar1810 03:31 AM
Demystifier

2 
543 
In my new found passion to understand the "inner meaning" of this thing called quantum theory, I've been trying to...

Jan809 12:08 AM
IPart

26 
5,625 
Can light travel through an atom? If yes, how will it emerge? If no, why not? Will it interact with any subatomic...

May2509 07:36 AM
malawi_glenn

19 
5,034 
My guess is either 14 or 12.
Which one is right? And please explain why.

Oct809 08:26 PM
SANGHERA.JAS

2 
1,605 
Can someone give a simple explanation of what this is about:
...

Sep2908 08:34 AM
my_wan

1 
1,048 
Ok is this article as silly as it seems to me?
http://www.physorg.com/news202539967.html

Sep210 02:06 PM
TheRealTL

1 
687 
What is the relationship between quantum spin and classical spin? I have seen this question asked many times but have...

Jan2305 11:19 PM
Hans de Vries

19 
1,850 
I was thinking about QM a few days ago and these are some questions which I finding difficult to answer based on what...

Jun3007 10:51 PM
jtbell

14 
13,364 
I was reading a paper on Loop Quantum Gravity, which stated something along the lines that the Immirzi parameter could...

Apr207 01:25 PM
pqnelson

0 
1,233 
We have a potential that is (1/2)kx^2 for x>0 and is infinity for x<0 ( half harmonic oscillator.
Now i want to...

Sep2408 09:35 AM
Count Iblis

2 
3,213 
I posted this in the calculus section...but no reply... I came across this while studying the most general noether's...

Feb1109 11:17 AM
lightarrow

4 
969 
I am currently reading Dirac Equation from PeskinSchroeder. In a particular para it says,
"Now let us find Dirac...

Jan3111 07:54 AM
A. Neumaier

8 
2,269 
I am having some trouble understanding the paragraph after eq (3.93) in Peskin Schroeder (Page 55). The chapter is on...

Feb2311 07:41 AM
praharmitra

1 
731 
Can someone explain to me how the authors got the second equation of eq (4.19), Page 84, of Peskin Schroeder.
The...

Mar3011 06:16 PM
muppet

3 
1,183 
This doubt is about a text in Peskin Schroeder Pg 86. I reproduce it here.

U(t,t')...

Mar3011 01:26 AM
strangerep

4 
1,396 
Given a stationary state
H \psi = E \psi \Rightarrow \left(\frac{\hbar^2}{2m}\frac{\partial^2}{\partial x^2} +...

Oct1812 03:33 AM
Jazzdude

9 
3,864 
I was just wondering what the product for two grassmann fields f(x) and g(x) where x is position and is not a...

Nov1411 02:11 PM
praharmitra

0 
1,079 
Is the following the definition of wedge product in tensor notation?
Let A \equiv A_i be a matrix one form. Then...

May112 03:47 AM
haushofer

1 
1,192 
So I want to calculate the quantum massless photon propagator. To do this, I write
A_\mu(x) = \sum\limits_{i=1}^2...

Jun1512 08:40 PM
praharmitra

0 
798 
So, in the calculation of D(t,r) = \left , where t= x^0  y^0,~ \vec{r} = \vec{x}  \vec{y} you need to calculate...

Jun1612 04:34 PM
praharmitra

0 
563 
Hello, this could be a basic question. I saw the link http://www.drchinese.com/David/Bell_Theorem_Easy_Math.htm on one...

Nov1610 01:42 AM
prajor

8 
1,589 
This is with respect to the Elitzur–Vaidman bombtester. Where the of wavefunction of photon is going to collapse is...

Nov210 03:17 AM
Demystifier

41 
5,080 
I have just completed Atomic Structure from my textbook. In that a Schrodinger Wave Equation is mentioned and after...

Jul3011 12:51 PM
PranavArora

2 
2,715 
is zitterbewegung lyk phenomena real...wen dirac equation can be easily reduced to schrodinger pauli equation why cant...

Nov2011 12:13 AM
PRANAVKUMAR

0 
641 
http://www.tuhep.phys.tohoku.ac.jp/~hotta/extendedversionqetreview.pdf
In the link above and by searching net with...

Jan1714 07:49 AM
DaleSpam

136 
17,604 
Hi there everyone. I'll try to keep this short. I'm currently a sophomore at a local college. I'm in Honors...

Sep112 07:17 AM
vanhees71

3 
750 
Hi all,
I would like to know what is the relation between charge and mass (of electron/proton/neutron). How far...

Jun1411 05:25 PM
LostConjugate

2 
615 
I had an argument with my Physics teacher. I know that light has been clearly proven to be a wave, because of the...

May907 07:42 AM
ZapperZ

47 
10,875 
How does one solve bound state problems in QFT(like an electron positron atom)? How does one identify the space of...

Mar1610 12:44 PM
meopemuk

1 
988 
I am looking for books or papers that explain conceptual ideas that underlie the study of quantum fields. I am looking...

Sep2111 02:44 AM
Demystifier

3 
1,131 
Can we measure the spin of a particle by measuring the force on a Magnet?
I wish to consider a modified stern...

Jul3112 11:29 PM
Prathyush

15 
1,551 
I am aware that physicists are trying to derive born rule from unitary evolution. Has there been any success? What is...

Aug1612 06:48 PM
bhobba

7 
1,098 
Is work done by the external agency when an adiabatic change in the Hamiltonian is performed on some State ψ?

Aug2612 03:03 AM
Prathyush

3 
606 
As the Title describes, Is the measuremet problem completely solved by the decoherence Program?
In specific I would...

Dec212 10:12 AM
Prathyush

88 
8,653 
what makes a metal sheet to reflect light? why doesn't individual metal atom reflects light?

May1810 09:00 AM
phyzguy

1 
1,385 
knowing the action
S=\int_0^\infty dt'\left
After the socalled wick's rotationt'=i\tau with \tau being real,
the...

Aug2309 10:07 PM
humanino

5 
986 
A B are twobody and onebody operators respectively.
Is the following equation correct? If so, Would you give me...

Aug2910 03:50 AM
PRB147

6 
1,488 