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If you are seeking help with a...

Feb2313 08:38 AM
ZapperZ

1 
30,461 
I'm away from my university studying in a far away land, and I dram up questions, but I have no one to ask...
Where...

Dec205 08:08 PM
rand310

0 
851 
Does anyone know the limits on a true two slit experiment?
I see where the use of “Grates” with larger particles...

Mar505 07:23 AM
RandallB

25 
4,446 
Puzzling paradoxes that classical explanations fail to resolve, but are resolved by QM include:
1 Electrons don’t...

Mar2005 06:06 PM
RandallB

23 
2,727 
Anyone else see the Penrose article in DISCOVER? "Two places at once"
Not sure what he’s thinking with the...

May1905 07:42 PM
selfAdjoint

3 
1,298 
LnGrrR
Since the old thread is well off topic from the OP
I’ll continue comments on Entanglement in a new thread ...

Apr306 09:01 AM
LnGrrrR

27 
2,876 
Flaw in Anton Zeilinger article (Rev. Mod. Phys., Vol. 71, No. 2, Centenary 1999)
This Thread is a continuation...

Nov2606 05:28 AM
vanesch

7 
3,850 
Does anyone know of a reference that describes the effect of adding a quarter wave plate or even a half wave plate...

Jan807 12:55 PM
RandallB

0 
1,194 
Einstein and a few others since the 1935 EPR paper took the position that defining in knowable terms a hidden variable...

Sep1507 02:18 AM
yuiop

39 
6,288 
Is BM “Bohmian Local” actually Local
The debate over “local” as defined by Bohmian Mechanics compared to the...

Sep507 04:33 PM
RandallB

17 
3,161 
Continuing the Dopfer discussion from other thread:
Well of course there would be a pattern when you change...

Aug2708 07:21 PM
Cthugha

29 
2,494 
At low velocity the group velocity is double the phase velocity (velocity of de Broglie waves). But phase velocity is...

Aug708 12:24 AM
cesiumfrog

1 
1,065 
During a lecture about QFT...

Jul2208 02:56 AM
Zacku

1 
1,654 
Are there experiments which you can claim that they are the evidence of the timeenergy uncertainty relation?
Or can...

Jan1810 03:23 PM
Bob S

2 
1,214 
Like the title says, why are the only possible values of an operator its eigenvalues?
reading shankar right now and...

Nov412 01:33 AM
atyy

2 
531 
So, when dealing with the Hydrogen molecule (H2) we know each electron is antisymmetric since they're fermions
i.e....

Nov1512 07:35 AM
andrien

1 
698 
When dealing with nparticle systems that are identical, is the superposition of them just a mathematical construct,...

Nov2312 08:06 AM
mfb

5 
850 
I'm looking through Nielson's book on quantum computation and information and in part of it he says that any $C^2(U)$...

Feb2613 05:23 AM
McLaren Rulez

1 
451 
I'm an undergraduate physics student and whilst Quantum Physics is a fascinating area, it has me constantly asking...

Jan510 09:32 PM
SimonA

3 
744 
I can understand that if z= a + ib then z*=a  ib, where the definition of the complex conjugate is reversing the sign...

Apr610 05:05 PM
Cyosis

2 
2,563 
I'm studying for my Quantum Mechanics course and I've understood most of it so far, until we reached the quantum...

Apr2410 02:20 PM
SpectraCat

1 
3,129 
Just started revision for Quantum Mechanics after a very long break so everything is a bit rusty. Don't have anyone...

Feb811 08:16 PM
randybryan

3 
863 
The TISE can be written as
\frac{\hbar^{2}}{2m}\frac{d^{2}u}{dx^{2}} + \frac{1}{2}m\omega_{0}^{2}x^{2}u = Eu
...

Feb2011 01:00 PM
RedX

4 
1,265 
To find the probability of a particle being at position x we use
<\Psi\Psi> where the complex conjugate ensures...

Mar1211 06:33 AM
randybryan

2 
1,329 
If I have an atom with energy levels of 4 ev, 2 ev 1 ev and 0 ev and I radiate it with photons which cover a...

Apr214 12:42 PM
ranger275

2 
181 
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 
9,617 
Do positively charged holes have any other quantum numbers assigned to them? What are the similarities and differences...

Feb310 02:59 PM
DrDu

29 
2,919 
Heavy particles produced in high energy collisions in accelerators are 'hidden' in normal low energy conditions. Might...

Mar2810 02:58 PM
Ranku

3 
836 
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 
1,344 
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 
1,525 
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 
2,997 
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 
4,540 
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 
3,083 
Problem:

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

Jun411 10:38 PM
ranytawfik

3 
1,326 
Suppose you have a container with perfectly reflecting walls, containing electromagnetic radiation that is not in...

Feb1312 04:27 PM
Rap

12 
2,249 
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 
2,866 
Hello Friends,
About Dirac's postulation about non conmutative operators and the scalar function with 4 elements,...

Feb1605 05:19 AM
Raparicio

4 
1,197 
Dear Friends,
Just adjoint a link to a page (finally and pourly translated to english) about the Schrödinger...

May1405 03:34 AM
Raparicio

1 
911 
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 
1,190 
I found this in Srednicki's QFTbook.
I don't know what ↔ means.
Help me, please

Jun1213 12:45 PM
Bill_K

3 
360 
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 
651 