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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
30,338 
Why is a photon considered to be its own antiparticle? What distinguishes a photon from an antiphoton? When photon and...

Feb310 02:20 AM
DrDu

25 
9,566 
Do positively charged holes have any other quantum numbers assigned to them? What are the similarities and differences...

Feb310 02:59 PM
DrDu

29 
2,905 
Heavy particles produced in high energy collisions in accelerators are 'hidden' in normal low energy conditions. Might...

Mar2810 02:58 PM
Ranku

3 
831 
In QM, particles are treated as either waves or particles, a duality exists. A test particle in freefall is used in...

Jun2204 05:14 AM
modmans2ndcoming

4 
1,342 
Here is a proposal that comes right out of Star Trek!
http://uk.arxiv.org/PS_cache/quantph/pdf/0401/0401186.pdf
...

Feb204 11:54 AM
ranyart

0 
1,520 
This paper is really thought provoking in its reasoning behind the HUP and how it imposes upon Maths and Physics.
...

Feb2704 08:33 AM
ZapperZ

3 
2,991 
Is there such a thing as a Law Of Observation? How would one define this Law?
If yes please state if this has its...

Mar1104 12:09 PM
jackle

15 
4,532 
Can Dirac equation be used for many particles (fermions) system (i.e. a nucleus with many electrons)? And in this case...

Feb1710 05:09 PM
clem

8 
3,069 
Problem:

I’m trying to understand how to generally find Eigen functions/values (either analytically or...

Jun411 10:38 PM
ranytawfik

3 
1,322 
Suppose you have a container with perfectly reflecting walls, containing electromagnetic radiation that is not in...

Feb1312 04:27 PM
Rap

12 
2,238 
Looking at the SackurTetrode equation for the entropy of a monoatomic ideal gas:
S=kN\left
S is entropy, V is...

Mar712 01:26 PM
Rap

18 
2,852 
Hello Friends,
About Dirac's postulation about non conmutative operators and the scalar function with 4 elements,...

Feb1605 05:19 AM
Raparicio

4 
1,193 
Dear Friends,
Just adjoint a link to a page (finally and pourly translated to english) about the Schrödinger...

May1405 03:34 AM
Raparicio

1 
907 
I have been trying to understand the field theory from the basics and have come across a few things I have not...

Mar711 11:32 AM
rapids79

0 
1,187 
I found this in Srednicki's QFTbook.
I don't know what ↔ means.
Help me, please

Jun1213 12:45 PM
Bill_K

3 
357 
there is potential V(x).
If at some point x=a wavefunction have some energy eigenvalue,
then Is it guaranteed that...

Sep2413 08:42 AM
rar0308

4 
469 
E is finite and V is infinite, So T should be negative infinite

Sep2913 03:33 AM
Jazzdude

29 
1,367 
Is there a way to know qualitative information about energy spacing of bound state energy?
Infinite square well....

Oct613 11:38 PM
Simon Bridge

7 
644 
Background. I recently started reading A Quantum Mechanics Primer by Daniel T. Gillespie. I'm up to the section on...

Jun2511 12:31 AM
Fredrik

4 
936 
I'm reading Daniel T. Gillespie's A QM Primer: An Elementary Introduction to the Formal Theory of QM. In the section...

Jul711 06:44 AM
Rasalhague

8 
1,683 
I've been reading Ballentine, Chapter 1. Have I got this the right way around? Taking our inner product to be linear...

Jul2511 04:59 PM
Rasalhague

10 
2,286 
Rafael de la Madrid writes:
 de la Madrid (2005): "The role of the rigged Hilbert space in Quantum Mechanics"...

Jul3111 03:58 AM
strangerep

28 
3,207 
i've seen both:
ΔxΔp >= h/2
and
ΔxΔp >= hbar/ 2
used, and i'm not sure which is correct. my physics...

May3112 07:11 AM
Demystifier

3 
1,076 
Hello,
First I want to apologize for this FAQlike question, but I couldn't find the answer anywhere here. so...I'm...

Oct2904 03:22 AM
dextercioby

17 
3,142 
Hello,
I was wondering about the BiefeldBrown effect. It is the force towards the (positive) smaller pole of an...

Dec904 05:18 AM
rashmatash

0 
3,336 
I had read that Roger Penrose and others (like Hameroff and Chalmers from Arizona) have been studying the possibility...

Jun3010 02:59 PM
flyzeggs

62 
7,921 
Mechanically speaking, where is the photon emitter aimed when there are 2 slits? If the experimenter was using an...

Mar1610 01:49 PM
DrChinese

17 
1,556 
I'm taking an introductoruy course on QM and qubits and my professor is frustrating me by using anthropromorphic terms...

Aug712 10:01 PM
bhobba

3 
556 
I'm trying to learn here. After all, you all know more about this stuff then I do. If you were to take a given mass of...

Mar3113 10:43 AM
Bill_K

3 
414 
In the 2 slot experiment, I always see the slots side by side. The electron seems to know if the second slot is open...

Apr113 11:27 AM
ratchettrack

2 
566 
We know the universe is not in a supposition state, so the wavefunction of the universe must have collapsed at some...

Aug1812 09:13 PM
ZapperZ

5 
829 
I finally got an answer to my question by a poster on this site, and my thread gets removed. I broke no rules, so it...

Aug1812 10:37 PM
jtbell

1 
497 
I've been told time and again that any beam of light (think laser) exhibits divergence no matter how perfect. This...

May2910 02:08 AM
sheaf

17 
2,241 
An electron travels as a wave. But what kind of wave?
Sound waves are longitudinal, light waves are transverse, but...

May2710 09:32 PM
glengarry

3 
1,499 
What is pure energy? Is it equal to radiant energy? What does that E in E=mc^2 stand for?

Apr2105 01:51 PM
pmb_phy

2 
3,067 
Would someone mind opening his or her Shankar page 153 and tell me what (5.1.10) and (5.1.11) exactly mean? Does...

Sep505 08:23 AM
Ratzinger

7 
2,016 
As I read in my quantum mechanics book the delta function is sometimes called the sampling function because it samples...

Nov1105 12:46 PM
Ratzinger

3 
1,426 
I read somewhere that quantum field theory does not allow calculations and predictions of bound states in a...

Dec2805 09:09 AM
wangyi

5 
2,871 
1. I found a nice site. http://math.ucr.edu/home/baez/photon/schmoton.htm
2. I also found a nice quote.
"All the...

Mar2206 06:51 AM
DaTario

25 
2,704 
The angular momentum is the generator of spatial rotations.
Are the commutation relations for angular momentum the...

May106 06:44 PM
Physics Monkey

1 
962 