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Feb2313 08:38 AM
ZapperZ

1 
34,018 
I had posted this question here : http://physics.stackexchange.com/q/69003/540
I guess its appropriate to post...

Jun3013 10:13 AM
The_Duck

1 
421 
Srednicki eqn. (2.23) and (2.24) states: We can make this a little fancier by defining the unitary spacetime...

Jun3013 07:25 AM
omephy

2 
621 
Sorry for my abysmal level of ignorance, but I'm not understanding why quantum tunneling from nothing is considered a...

Jun2913 04:51 PM
ZapperZ

2 
420 
Hello everyone,
a number of books and web articles says that the minimum field required is ≈10^7V/cm for electrons...

Jun2913 08:30 AM
ZapperZ

3 
538 
Hi :)
In this lecture (http://www.youtube.com/watch?v=Igl8hE3Eac0), susskind talks about attractive the force...

Jun2913 05:09 AM
FredericGos

3 
608 
Hello everybody, I am a first year student and I have a question about tunneling.
If we have an electron which is...

Jun2813 11:59 PM
Simon Bridge

9 
953 
Do the units of a wave function vary? i have heard that it just joules. What do you think?

Jun2813 02:40 PM
dextercioby

11 
1,205 
In Zee's QFT book he writes an amplitude as:
M(p)=\lambda_0+\Gamma(\Lambda,p,\lambda_0)
He then states that you...

Jun2813 08:51 AM
andrien

1 
475 
Say I have a particle in the rest frame with spin up in the z direction. If I boost the system in x direction, does...

Jun2813 07:13 AM
DrDu

16 
1,122 
If we have twin photons moving in the opposite direction.
For the first photon we can pass it through a polarizer...

Jun2713 09:47 AM
TeCNoYoTTa

4 
648 
Let an electron is orbiting in a orbit with the principal quantum number n =1. According to wave mechanics its angular...

Jun2613 11:06 AM
apr

3 
684 
In Zee's book at page 12 in both editions he finds that he can write the amplitude
$$\langle q_fe^{iHT}...

Jun2613 07:29 AM
andrien

5 
863 
Hi, I hope there is no issue with me posting this here but I'm stuck trying to get my head around DrChinese's page on...

Jun2613 06:45 AM
Badvok

98 
7,133 
hi,
i just need a quick clarification on pair production.
from my limited understanding, a photon of...

Jun2613 04:20 AM
mfb

1 
478 
Apologies if these questions have been answered before  I didn't have any luck with google. Something has bugged me...

Jun2513 07:10 PM
cosmik debris

8 
958 
I just watched a video of James Gates and he discussed something he called the Gross Perrywall phase transition. It...

Jun2513 04:30 PM
Skeezer

6 
1,549 
I'm not sure whether to post this here or not, but since the book is about quantum i figured it was as good a place as...

Jun2513 02:49 PM
res3210

2 
545 
Hello,
Can anyone please explain that how we can calculate the eigenvalues of a slab waveguide by using the...

Jun2513 08:26 AM
engrriz

0 
452 
Bohmian Mechanics conflicts with so many observational facts:
1. Bohmian Mechanics severely violates Lorentz...

Jun2513 03:25 AM
Demystifier

235 
28,184 
what will happen TO THE ATOM if electron end up inside the nucleus ( as in quantum tunnelling) ?

Jun2513 03:16 AM
Tada Amda

3 
600 
I'm trying to understand the implications of the doubleslit experiment, and I have been considering what QM theory...

Jun2413 12:14 PM
Cthugha

13 
1,372 
Two entangled photons are created via, say SPDC, by striking a single photon on a crystal.
The two entangled...

Jun2413 10:53 AM
San K

2 
493 
Does anyone know if data from an actual quantum eraser experiment is freely available anywhere? In particular, I'm...

Jun2413 10:25 AM
msumm21

0 
353 
Hello Everybody.
Could two past events result in the same happening? For example: We have observed the "incident A"...

Jun2413 08:39 AM
skeptic2

6 
745 
I am a little confused when it is stated that Schrödinger's equation represents a deterministic evolution of the wave...

Jun2313 10:29 PM
nomadreid

4 
1,169 
I'm studying Shankar's book (2nd edition), and I came across his equation (15.3.11) about spherical tensor operators:...

Jun2313 04:51 PM
Bill_K

1 
510 
I am having trouble getting the kraus matrices(E_k)) from a unitary matrix. This task is trivial if one uses dirac...

Jun2313 04:22 PM
Henriamaa

0 
439 
what is the difference between strong force and residual strong force ?what is its range?

Jun2313 12:02 PM
mfb

1 
558 
I have read the following three simplifications in various places, but together they give a contradiction, so at least...

Jun2313 01:57 AM
nomadreid

3 
523 
I haven't studied quantum physics academically and I have no understanding of it mathematically so forgive me if my...

Jun2213 11:41 PM
wotanub

1 
476 
Hello,
The quantum zeno effect is well understood and experimentally confirmed as regards polarization...

Jun2213 10:09 PM
strangerep

9 
962 
I was reading through my Principles of Quantum Mechanics textbook and arrived at the section that discusses the...

Jun2213 11:15 AM
Bill_K

6 
519 
The Hamiltonian is ##H=\hbar \omega (a^\dagger a+b^\dagger b)+\hbar\kappa(a^\dagger b+ab^\dagger)## with commutation...

Jun2213 06:39 AM
Bill_K

1 
401 
Bell theorem say that there is a contradiction between the locality principle in special relativity theory and quantum...

Jun2213 05:46 AM
stevendaryl

17 
1,616 
The vacuumvacuum expectation value in the absence of a source is in general not equal to 1, but exp, where E is the...

Jun2113 10:36 PM
geoduck

3 
543 
Relativity says photons have energy E=pc. Classical physics says E=1/2 pv. There seems to be a factor of 2 missing...

Jun2113 10:25 PM
PBTR3

3 
600 
I'd like to know if creation and annihilation operators are involved in a free trajectory of a particle from point A...

Jun2113 07:17 PM
Simon Bridge

1 
418 
The average particle energy of a FermiDirac gas, with zero chemical potential, is about 3.15T, where T is the...

Jun2113 01:32 PM
Avodyne

5 
516 
Superposition caused by  Double slit, MachZehnder
Quantum superimposed paths/waves interfere ...for example the...

Jun2113 12:39 PM
San K

8 
1,259 
In isolated time evolution, the Schrödinger equation takes one state ψ1 to ψ2. But it does this with certainty, no?...

Jun2113 09:22 AM
vanhees71

21 
1,030 