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xzd209's user avatar
xzd209's user avatar
xzd209
  • Member for 5 years, 3 months
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8 votes
Accepted

Why does vector potential $\mathbf A$ satisfy $\mathbf E = -\nabla \phi - \frac{\partial \mathbf A}{\partial t}$?

8 votes
Accepted

Different coordinate system as opposed to different reference frame

7 votes
Accepted

Inverse of the coordinate transform Jacobian

4 votes
Accepted

Research Proposal in Statement of purpose for integrated Phd Theoretical Physics

4 votes

Height of Liquid Droplet on Flat Surface

3 votes

Another Solution To Brachistochrone Problem

3 votes

SUSY Kinetic and $W$ potential terms: RG flow --- free or interacting

3 votes
Accepted

Ground state of Hamiltonian

2 votes
Accepted

Coulomb Integral in Helium Variational Approximation

2 votes
Accepted

On the limits of Kepler’s second law

2 votes
Accepted

Can accelaration of a falling mass be positive when upwards direction is positive? What am I missing?

2 votes
Accepted

Landau Classical Mechanics - Disintegration of particles

2 votes
Accepted

Hamiltonian formalism in Goldstein's matrix representation, chap. 8.1

2 votes
Accepted

Time dependence in non-dispersive waves

2 votes
Accepted

Reversing electric field and potential relation

1 vote
Accepted

Expression for the causal retarded potential for $t<0$ must give $0$ but my calculation produces a nonzero result. What's the mistake?

1 vote
Accepted

How to show that $\sigma^2\psi_L^*$ transforms as a right-handed spinor? (Peskin&Schroeder)

1 vote

Degeneracy in the particle in a circle problem

1 vote

Could someone tell me how Sir Issacc Newton derived the equation for the Universal law of gravitation?

0 votes

Adjoint operators and the method of variation for the Orr-Sommerfield problem

0 votes

Horizontal component of velocity in case of rolling

0 votes
Accepted

Cancellation of vacuum bubbles in the correlation function

0 votes
Accepted

Plaquette operator in Kitaev honeycomb model

0 votes

Where can I find a detailed derivation of the form of two-body operators in the second quantization?

0 votes

Demonstration that electric current at equilibrium is zero in crystals

0 votes
Accepted

Path integral derivation of exact identity for bosonic field

0 votes

Description of the center of mass of a string in string theory