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Physics : Recent Questions and Answers (Page 615)

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

Wolff algorithm for anisotropic Ising model

Question Is there way to simulate a 2D Ising model with anisotropic coupling parameter $J_{ij}$ and zero external field using Wolff algorithm? Particularly, I am looking for when coupling...

Asked on 01/27/2021

0 answer

Derivation of the Dirac spinor expressed as a Fourier transform

IntroductionFor the Klein Gordon Field, the equations of motion are described by the equation $$(partial_{mu}partial^{mu} + m^2)phi(vec{x},t)=0$$ Which when the field is expressed as a Fourier transform of the...

Asked on 01/27/2021 by Joshua Pasa

0 answer

Prove that the electric field produce by a punctual charge is isotropic and radial

I would like to prove mathematically that the electric field produced by a punctual charge is isotropic and radial, i.e. $$vec{E}(r,phi,theta)=E(r)vec{e}_rtag{1}$$ I think that this statement is visually...

Asked on 01/27/2021

1 answer

Why does tensor formulation of Lorentz force law guarantee Lorentz invariance?

The Lorentz force law is $$vec{F}=q(vec{E}+vec{v}timesvec{B}).$$In tensor formulation, it is$$f^mu=qU^lambda {F_lambda}^mu.$$ In Sean Carroll's spacetime and geometry book, pg. 32-33, he said thatthe...

Asked on 01/27/2021 by TaeNyFan

0 answer

How do I determine the zero elements of a Hamiltonian in a 4 ket space?

The Hamiltonian matrix of particle subject to a central potential is described by $$H=begin{pmatrix}H_{11} & H_{12} & H_{13} & H_{14}H_{21} & H_{22} & H_{23} & H_{24}...

Asked on 01/27/2021 by Vinícius Frehse

0 answer

Why in the field theory, particle's motion is described by 0+1 dimensional field theory?

I started reading the lecture notes on Path integral formulation by Ashoke Das. At the very first page of the introduction chapter, he says that - "a theory describing the...

Asked on 01/27/2021 by Samapan Bhadury

1 answer

What is U-duality? and Why U-duality is important?

In string theory, we know three dualities. S-duality: Extension of Electric-magnetic duality, Duality between strongly coupled qft and weakly coupled qft. (One of the typical example is Seiberg duality in...

Asked on 01/27/2021

1 answer

Dispacement current value through dielectric

Will the displacement current be multiplied by K when a dielectric is placed between the plates of a capacitor. Will its value then be K times the value without dielectric....

Asked on 01/27/2021 by Aditya Roychowdhury

0 answer

Coordinate system dependence of simple charged particle

Two questions, 2nd to be written separately concerns more difficult problem for motion of extended charge distributions. First: Two point charges q1,q2. Determine motion of q1 using Newton's...

Asked on 01/27/2021

1 answer

SHM phase relations between v,a,y

I was reading about the phase relation between the displacement , velocity and acceleration of a particle executing SHM.I understood that all three differ in phase by π/2 radian respectively...

Asked on 01/27/2021 by user270071

1 answer

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