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Physics : Recent Questions and Answers (Page 721)

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

Lie algebra: Proof that the commutator of infinitesimal motions is an infinitesimal motion

I am following Classical and Quantum Mechanics via Lie Algebras by Neumaier and Westra.SetupI am stuck at part of Thm 2.3.1. Consider the matrix group $mathbb{G}$....

Asked on 12/20/2020 by jgerber

1 answer

What does the inter-photon force look like (as mediated by electrons)?

Most often we think of photons mediating a force between charged particles (e.g. electrons and positrons), and it's a standard exercise in QFT to do the computation and find that,...

Asked on 12/20/2020 by Alex Meiburg

1 answer

Plasma directly to Solid or Liquid and vise versa

Let's forget how and go straight to the beef and potatoes. What do you scientifically call it when a plasma turns to liquid and skips recombination, and/or condensation? What about...

Asked on 12/20/2020 by Camo_man

1 answer

Does the $3$-body problem imply that determinism is false?

Classical mechanics is famous for its supposed ability to theoretically calculate the state of a system at any given time provided all the necessary initial conditions. I believe this is...

Asked on 12/20/2020 by Arc DDD

6 answer

Floquet Quasi-Energy spectrum in periodically driven lattice (Numerics)

I am trying to understand the steps for numerically diagonalizing the Hamiltonian for an amplitude modulated lattice. I am trying to follow along with the calculations in section 4.6...

Asked on 12/20/2020 by yankeefan11

0 answer

Eigenvalue and eigenfunction of Hamiltonian on interval $[0,1]$

I am seeking the minimum eigenvalue and the eigenfunction of the following Hamiltonian on interval $[0,1]$; $$hat{P}^2+ c hat{Q}^{-1} + c (I-hat{Q})^{-1}$$ where $c $ is an...

Asked on 12/20/2020 by Masahito Hayashi

0 answer

How energy is transferred between charges?

When we move an electron(e1) towards another electron(e2, not fixed), the work we do is stored as potential energy in e1 but from where does e2 get energy to be...

Asked on 12/20/2020

2 answer

Confused about SM neutrinos

I am a bit confused about neutrinos in the standard model. The vertex of the weak interaction charged current, implies that any neutrino interacting through the charged current must be...

Asked on 12/20/2020

1 answer

What would be the view like from inside a black hole looking towards the event horizon?

Ignoring the fact that we would be torn apart by gravitational gradient and assuming we get some time to make some observations before hitting singularity, what would we see looking...

Asked on 12/20/2020 by thokiro

6 answer

Mechanics based query pertaining to force and conservation of energy

A wedge of mass M lies on a smooth horizontal plane while a block of mass $:m=M/2:$ is in contact with the smooth inclined face of the wedge . The...

Asked on 12/20/2020 by Jane dew

1 answer

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