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Physics : Recent Questions and Answers (Page 161)

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

How to determine the collapse operator for a Lindblad equation

Given a Hamiltonian $H$, how can I relate the collapse operator for the Lindblad equation to a given environmental effect? Also, how can I relate the constant $gamma$ in front...

Asked on 07/25/2021 by TanMath

1 answer

Qualitative behavior of a potential based on physically acceptable wavefunction

Given the behavior of a wavefunction, how should one gain an intuition about the qualitative behavior of the potential in...

Asked on 07/25/2021

1 answer

$SU(3)_F$ flavour symmetry and $SU(2)$ isospin symmetry

There is an approximate $SU(3)_F$ flavour symmetry that exists at the quark level between $u$, $d$ and $s$ quarks. But we often talk about an approximate ...

Asked on 07/25/2021

1 answer

How groups act on fields in QFT?

I read a lot a posts on how to verify what are the symmetries of a given Lagrangian but I really can't find what I need and can't even get...

Asked on 07/25/2021 by Gianluigi

1 answer

Tangent spaces at different points in special relativity

In the book Theoretical Physics by J. C. Dutailly the author saysHowever because the manifolds are actually affine spaces, in SR andGalilean Geometry the tangent spaces...

Asked on 07/25/2021

1 answer

How to quantize a system if kinetic energy depends on coordinate?

In a standard physics course we usually learn that quantization of a system is ambiguous if momentum and position happen to be multiplied in the classical Hamiltonian (i.e. the classical...

Asked on 07/25/2021

1 answer

Ampere’s Law Field zero?

My textbook states that If $int Bcdot dl=0$, it does not necessarily mean that $B = 0$ everywhere along the path, only that the total current through an...

Asked on 07/25/2021

0 answer

How can reflection and refraction be explained classically and microscopically?

I was trying to explain something about Brewster's angle and realized I don't completely understand how reflection and refraction work on the microscopic, classical level. Consider a plane polarized...

Asked on 07/25/2021

4 answer

How to calculate shear force on tubing wall?

For my application, I have water entering a small diameter (D1) tubing (a hypodermic needle tubing) with pressure (P1) and exiting into the atmosphere. The tubing is also very...

Asked on 07/25/2021 by taj88

1 answer

A question involving chiral transformations and gamma matrices

I'm looking at a calculation that involves an infinitesimal transformation of a Dirac fermion field: $$Psi rightarrow e^{i beta gamma^5} Psi.$$ Then the conjugate field $bar{Psi} = Psi^{dagger}...

Asked on 07/25/2021

1 answer

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