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Feb2313 08:38 AM
ZapperZ

1 
36,145 
given the divergent integral in nvariables
\int_{V} f(q1,q2,....,qn)dq1,dq2,....dqn
my question is if in...

Aug2510 06:17 AM
vanhees71

2 
1,155 
In the standard derivation of the virial theorem, one assumes to be working in the energy basis. One then gets <T> =...

Aug2510 05:43 AM
Heirot

2 
1,049 
since forces are communicated by particles i find it hard to envisage how unbrocken forces are communicated. That is...

Aug2510 05:20 AM
NanakiXIII

2 
983 
Forgive me if I have not grasped the ideas and intricacies of the Many Worlds theory. If I don't quite understand it...

Aug2510 04:52 AM
Vanadium 50

1 
1,436 
I would like some help on the following questions.
1) If we have two interacting particles A and B. Can we still...

Aug2510 04:11 AM
strangerep

12 
1,911 
With the Lorentz group (SO(1,3) = SU(2)xSU(2)), if you're working with the "true" SU(2) generators N^+_i and N^_i...

Aug2510 03:39 AM
ismaili

11 
1,819 
In an empty volume of space is it true that there are particles being spontaneously created and annihilated with their...

Aug2410 11:27 PM
Daveman20

0 
1,975 
Hello. I have recently been introduced to the concept of electrons as standing waves around the atomic nucleus. The...

Aug2410 07:41 PM
alxm

3 
2,037 
I'm trying to work out the generation rate of InGaN, but don't know how to start SchrödingerPoisson self consistent...

Aug2410 05:48 PM
sweety0423

0 
1,673 
I'm probably missing something small but I haven't been able to figure this out. In the Feynman rules (for a scalar...

Aug2410 10:26 AM
NanakiXIII

4 
1,431 
I've been trying to understand the uncertainty principle and so far the Wikipedia definition has been very good...

Aug2410 09:13 AM
dx

9 
2,249 
Could you tell me what is Wick rotation and how to use the rotation when we compute integral
A_0 = \int {\frac{{d^D...

Aug2410 07:35 AM
Lepton_vn

0 
1,330 
Virtual photons are not "observed" because they have a deficit of energy. When they are emitted from particles...

Aug2410 06:08 AM
muppet

4 
1,370 
The title is the best way I could group this thought. And the following is most likely sloppy so I do apologize.
I...

Aug2410 03:45 AM
Demystifier

7 
1,713 
I've been reading "Programming the Universe" by Seth Lloyd, a quantum computer scientist. He goes on and on about the...

Aug2310 06:11 PM
MikeFromOhio

3 
844 
I'm phd beginner and now my topic is learning how touse the 6 band kp method to work out the generation rate of QD...

Aug2310 05:56 PM
sweety0423

0 
1,869 
i have just started studying quantum physics, please clear this doubt
energy is in small packets called quanta....

Aug2310 04:04 PM
map19

11 
1,957 
Does anyone know the stances of prominent physicists (Susskind, Hawking, others) on hard determinism?
I wonder how...

Aug2310 03:48 PM
schmitmg

0 
1,313 
I'm trying Zee's quantum field theory text as selfstudy (I'm years out of college) and about 100 pages into it. I...

Aug2310 10:30 AM
jhaber

2 
1,212 
Thought experiment:
An X number of lasers shoot a photon simultaneously at a single point in space. Given...

Aug2310 04:30 AM
Cthugha

9 
1,325 
Hi,
I'm about to go into my 4th and final year of my undergraduate physics degree and after all the quantum mechanics...

Aug2210 11:40 PM
alxm

10 
3,024 
Hi, I have some questions about time travel. My understanding is that it is an accepted theoretical consequence of...

Aug2210 08:04 AM
Dmitry67

2 
1,332 
Okay, from what I understand, the cosmological redshift is due to the expansion of the universe. I'm confused as to...

Aug2110 02:51 PM
Naty1

2 
1,159 
So I read somewhere about some equation that might explain the Electron/Proton mass ratio, but it was off by several...

Aug2010 10:32 PM
meadbert

5 
3,150 
In http://www.nat.vu.nl/~scharnh/m16newsc.htm
it is described correction to the speed of light, if a measurement is...

Aug2010 06:45 PM
nismaratwork

9 
1,686 
I came across an article in HuffPost entitled : Does the Past Exist Yet? Evidence Suggests Your Past Isn't Set in...

Aug2010 03:59 PM
DrChinese

2 
1,720 
Hello All,
In Griffiths book, "Introduction to Quantum Mechanics", pg 300 (Time Dependent Perturbation) he notes...

Aug2010 06:27 AM
mohammed.omar

0 
1,222 
What causes positive TMR? Whats the reason for negative TMR? In some tunneling junctions why is there a switch between...

Aug2010 03:48 AM
rejinisaac1

0 
611 
Forgive me for such a basic question, but recently I have been reading up on entangled particles. It seems that a lot...

Aug1910 11:57 AM
LBrandt

6 
1,531 
I'm still enjoying Daniel T. Gillespie's "A Quantum Mechanics Primer". It includes six postulates of quantum...

Aug1910 10:53 AM
vanhees71

7 
1,140 
let L be angular momentum operator.
= 0
= 0 (I haven't prove this, but appearantly it's correct according to...

Aug1910 08:15 AM
Ykjh98Hu

2 
798 
In quantum renormalization, one distinguishes between the (unobservable) bare electron and the observable...

Aug1810 11:22 PM
nomadreid

4 
1,300 
I want to study a detailed proof of the Nuclear Spectral Theorem
(which underpins the use of Rigged Hilbert Spaces in...

Aug1810 10:04 PM
strangerep

5 
3,028 
In Zee's quantum theory text, introducing the Dirac equation, he states the gamma matrices as direct products of Pauli...

Aug1810 07:56 PM
jhaber

4 
3,093 
Hey all,
I've got a Hamiltonian of the form
H = \omega (\sigma_z^1  \sigma_z^2) + J \sigma_z^1 \sigma_z^2
...

Aug1810 04:13 PM
peteratcam

5 
709 
Someone please tell me if I am thinking right:
Let's consider an unperturbed electronic state of an atom/molecule....

Aug1810 12:19 PM
qbert

1 
1,008 
I'm trying to understand how exchange of particles can constitute a force. I read a chapter on this in Zee's Quantum...

Aug1810 10:36 AM
DrDu

5 
950 
The propagator D for a particle is basically the Green's function of the differential operator that describes that...

Aug1810 06:54 AM
NanakiXIII

22 
3,247 
Hello!
Is it true that virtual particules pop into existence uncaused?
thank you

Aug1810 06:06 AM
nomadreid

1 
1,009 
I understand decay is truly a random process approximated by halflife. So two particles that appear similar to us in...

Aug1810 02:00 AM
DrDu

4 
1,794 