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Physics : Recent Questions and Answers (Page 510)

Find answers to your questions about Physics or help others by answering their Physics questions.

Integral of gauge field bulk to boundary propagator in AdS

I'm studying from the book "Introduction to the AdS/CFT Correspondance" by Horatiu Nastase.In page 190, he defines the gauge field bulk-to-boundary propagator in Euclidean $AdS_{d+1}$ given by...

Asked on 03/06/2021 by zetaquarrel

0 answer

Back of the envelope calculation for energy released by fission bomb based on binding energy?

I read that the strong force is twenty frigging pounds between every two tiny protons. So by multiplying this, say, 10kgs by the number of atoms that undergo fission, do...

Asked on 03/06/2021

0 answer

Water flow in salt solutions contemporary exposed to an electrical and constant magnetic field

When a permanent magnet is held motionless close to a salt solution which already has been exposed to an electrical field a flow in the water will be induced and...

Asked on 03/06/2021 by Benjamin B

2 answer

Yukawa potential in 3-dimensional spacetime

Assume $D$-dimensional Minkowski spacetime with one time dimension and $Dge 2$. Using the mass-$m$ Klein-Gordon propagator for a scalar interaction, we can derive a potential energy$$E=-intfrac{d^{D-1}k}{left(2piright)^{D-1}}frac{exp ikcdot r}{k^2+m^2}$$(see e.g. Quantum...

Asked on 03/06/2021

2 answer

On which propagator does the field self-contraction loop go on this Feynman diagram?

This question relates to page 111 in Peskin and Schroeder. I am trying to do the derivation of the 2-particle to 2-particle Feynman diagrams in $phi^4$ theory by hand,...

Asked on 03/06/2021

1 answer

Feynman diagram for the 2-point one-loop 1PI diagram

If I have the $phi^3$-interactive theory. How can I draw the Feynman diagram for the 2-point one-loop 1PI diagram?...

Asked on 03/06/2021 by MZperx

1 answer

How would gravity affect a spring?

I'm currently in the process of writing a novel and I would like to add realism, I'm writing in a concept that involves springs stretching and tightening due to a...

Asked on 03/06/2021 by Micheal L

3 answer

Do electrons always emit photons?

You know how the way that electrons repel other electrons can be explained using particle interaction?... Well, in that explanation an electron emits a photon...where does it get the energy...

Asked on 03/06/2021

2 answer

Partition function for 4 spins

I was reading some notes by John Chalker on order by disorder and encountered a classical spins partition function calculation. I could not follow the integration, i.e. obtaining eqn. (1.7)...

Asked on 03/06/2021 by Mircea Bejan

1 answer

Calculating stopping distance of a car on an inclined plane with friction

I'm having trouble properly conceptualizing a question. The question is: "Suppose you are driving down a steep hill (5 degrees, 8.7%, which is fairly steep for roads), on a rainy...

Asked on 03/06/2021 by i2Witty

2 answer

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