Physics Questions, Problems & Solutions : TransWikia.com ~ Page 38

Reference request for vertex correction of electron-phonon interaction beyond Migdal's theorem

I am considering the calculation of the vertex correction due to electron-phonon interactions. Specifically, I am looking for solutions to the integral (Eqn. 1) $$int dq G(q)D(q-p)G(p+k)$$ where ...

Asked on 10/29/2021

0 answer

Why are the number of magnetic field lines finite in a particular area?

One can draw/imagine as many unique (curved/straight) lines as he/she wants in some specified finite area (assuming that each line is unique if it doesn't overlap with another line). Then...

Asked on 10/29/2021

5 answer

Why quarks are confined? Why can't they be found in unbound states?

No one has observed before a "free" quark, i.e. a quark in an unbound state. According to one paper, I read that $pbar{p}$ collision produce unbound $tbar{t}$ pair...

Asked on 10/29/2021

3 answer

Why does a collection of radioactive atoms show predictable behaviour while a single one is highly random?

Well, we know that it is impossible to say exactly when a radioactive atom will go on decay. It is a random process. My question is why then a collection...

Asked on 10/29/2021

9 answer

Percolation universality class

There's very good table of different universality classes: Ising model lies in the same universality class with $phi^4$ theory.Ising in $d≥4$...

Asked on 10/29/2021

0 answer

General Relativity: is there a better way to get spherical coordinates?

We know that (see this wikipedia page) in the metric of Minkowski spacetime:$$ds^2=(dt)^2-(dx)^2-(dy)^2-(dz)^2 tag{1}$$and we also know that in spherical coordinates this same metric becomes:...

Asked on 10/29/2021

6 answer

Is this a kinematics paradox?

You consider a shaft which can rotate freely (there will be of course a frame with ball bearing to hold the shaft firm and to allow it to rotate with...

Asked on 10/29/2021

4 answer

What makes a constant of nature fundamental?

I came across a video on youtube in which Alexander Unzicker argues that in order to have a scientific revolution, one of the constants of nature should...

Asked on 10/29/2021

1 answer

Why no gravity lens around planets?

If large mass causes a curvature around spacetime, then why don't we see a gravity lens around our planets?...

Asked on 10/29/2021

4 answer

In Maxwell's demon, why are all the cold gas molecules on the same side?

In the Maxwell's demon thought experiment, initially, the gases in both boxes have the same temperature. The devil uses the door in the middle to allow the...

Asked on 10/29/2021

2 answer

Ask a Question

Get help from others!

Physics : Recent Questions and Answers (Page 38)

Ask a Question