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Feb2313 08:38 AM
ZapperZ

1 
36,445 
I mean, which is the operational mechanism? Is it deterministic? I mean, can I "grab" two particles and make them...

Aug1213 09:24 PM
Simon Bridge

1 
943 
Hello.
I'm trying to make a "Mach–Zehnder interferometer", that would show a samenamed paradox.
In plain words:...

Aug1213 05:55 PM
Cthugha

1 
372 
Hello there!
I´ve tried searching the internet but seems to be in need of a heavy book for this answer. I stumbled...

Aug1213 03:26 PM
TrifePhysics

7 
704 
I've been looking for work on this, and I was hoping someone could confirm or deny that anyone has done any before. I...

Aug1113 09:21 PM
michael879

2 
594 
This is just a little note describing something that may be common knowledge, but I was confused about, myself, which...

Aug1113 08:35 PM
stevendaryl

10 
932 
Hello everybody,
I have a short question about the renormalization scale.
For dimensional regularization we...

Aug1113 08:08 PM
king vitamin

1 
462 
Is there a smallest possible amount of energy? Like, one where all energy quantities in the universe are a multiple of...

Aug1113 05:54 PM
Vanadium 50

1 
439 
hi
i know what is coherent state, but i read this text in an article and i don't understand this
"
if we wish
to...

Aug1113 03:56 AM
strangerep

9 
966 
hi
i read some text about causality and determinism, but i can't exactly distinguish between them.
what's really...

Aug1113 03:14 AM
king vitamin

4 
558 
Two questions
1) The total orbital spin angular momentum is given as L2=l(l+1). What is the source of or meaning...

Aug1013 06:05 PM
Simon Bridge

4 
747 
The way I saw it, we lived in a deterministic universe. And all the claimed randomness in the quantum world was just...

Aug1013 05:16 AM
bhobba

13 
1,084 
When a particle decays into two different particles, they are said to be entangled. If one of these is absorbed by an...

Aug1013 01:00 AM
meBigGuy

1 
407 
Binding energy equations can be derived for the main spherical orbitals of hydrogen. If derived correctly, the...

Aug913 11:30 PM
sb635

19 
1,190 
According to QM the ground state of the quantized empty space is not considered to be empty but as a fluctuating sea...

Aug913 02:21 PM
tom.stoer

23 
1,737 
hi
i read some texts about problems of quantum gravity, but i don't i was confused.
anybody can help me to...

Aug913 02:05 PM
Vanadium 50

1 
427 
Hello!
I have worked with Green's functions in electrodynamics and have now started reading qft.
First I...

Aug913 09:47 AM
Kontilera

6 
552 
Hi All,
I would like to know why in the infinite well problem, after having solved the time independent SE, we are...

Aug913 08:05 AM
gadong

9 
678 
hi there. I studied physics for years, even went as far as getting a PhD. but that was 13 years ago, since then...

Aug913 12:07 AM
tom.stoer

25 
2,473 
Say for a simple hydrogen atom, an electron absorbs just the right amount of energy such that it jumps up from energy...

Aug813 07:44 PM
fzero

2 
503 
I have three quick questions regarding the experimental setup attached, in relation to Hardy’s Paradox.
What...

Aug813 06:55 PM
StevieTNZ

6 
658 
I have heard that Schrodinger's interpretation of his equation is different from the modern interpretation. What was...

Aug813 09:57 AM
Naty1

8 
734 
Suppose I know
H \psi(x) = \left( \frac{1}{2m} \Delta_x + V(x) \right) \psi(x) = E\psi(x).
Then
...

Aug813 08:11 AM
vanhees71

1 
424 
The recent activity on Bells theorem in PF has triggered my interest in the subject and I have added Bell to the list...

Aug713 07:47 PM
morrobay

79 
9,299 
I'm trying to understand the PBR proof as explained in their paper on arXiv (http://arxiv.org/abs/1111.3328). I'm...

Aug713 09:37 AM
Mathematech

3 
718 
To keep it simpler let take the electromagnetic (EM) field.
A photon, in one perspective, can be described as an...

Aug713 09:06 AM
San K

4 
606 
While reading Zurek paper Decoherence and the transition from quantum to classical  REVISITED, he makes the...

Aug713 08:37 AM
jfizzix

7 
534 
Alice entangles a pair of particles and sends one of the pair  particle B  towards Bob, keeping the other one ...

Aug713 04:13 AM
mfb

13 
1,019 
Dear Forum,
I have discovered by accident the method developed by Feynman and Stuekelberg to explain the origin of...

Aug713 03:44 AM
vanhees71

3 
455 
what is differences between collapse,reduction, decoherence , weak projection and strong projection in quantum...

Aug613 04:53 PM
kith

12 
1,604 
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 
588 
Is it possible to explain simply what a Theory of Quantum Gravity is supposed to achieve/explain and why it is needed.

Aug613 04:09 PM
audioloop

10 
907 
Consider the vacuum state that is hypothesised to precede the moment of inflation in classical inflationary theory.
...

Aug613 12:59 PM
Maximise24

0 
448 
I am trying to understand the how the time evolution operator is used versus the Feynman propagate.
My limited...

Aug613 08:42 AM
qtm912

2 
434 
There is a statement in the Landau and Lifgarbagez volume on quantum mechanics that has had me puzzled for weeks now....

Aug613 07:48 AM
Geofleur

8 
676 
Hello All,
I am quiet new to the subject, so if anybody can help me.
The four fundamental forces of nature,...

Aug613 06:49 AM
mfb

1 
418 
Is there a connection between the Dirac four spinor and "spin up", i.e one of the four spinor states is spin up or are...

Aug613 05:12 AM
Bill_K

6 
674 
In conventional renormalization, for the selfenergy, is it possible to make a subtraction from a point not equal to...

Aug613 03:47 AM
andrien

3 
446 
h is a constant in Planck's equation but I have not seen anything written saying that the frequency cannot be...

Aug513 12:59 PM
Avodyne

11 
1,199 
I'm a bit confused by vacuum "fluctuations" (I know there is nothing fluctuating since vacuum is lorentz invariant)...

Aug513 11:27 AM
Sonderval

11 
833 
This question comes from section 2.3 of 'Quantum Field Theory' by Lewis Ryder. The discussion is on the Lie Group...

Aug413 04:38 AM
vanhees71

1 
438 