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Lopey Tall
  • Member for 5 years, 4 months
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8 votes
1 answer
728 views

General relativity as a gauge theory of the Poincaré algebra

6 votes
2 answers
827 views

Bertrand's theorem and nearly-circular motion in a Yukawa potential

5 votes
2 answers
236 views

Inönü-Wigner contraction of Poincaré $\oplus$ $\mathfrak{u}$(1)

2 votes
1 answer
667 views

Going from the Dirac Lagrangian to the adjoint Dirac equation

2 votes
0 answers
414 views

Gamma matrices and the metric

2 votes
1 answer
131 views

Dirac delta, Fourier transform & exponentials

2 votes
1 answer
789 views

Wedge product, tensor product, and Levi-Civita tensor/symbol

2 votes
0 answers
110 views

Gravity from algebra

2 votes
2 answers
3k views

Finding the expression for probability density (the Klein Gordon equation)

2 votes
1 answer
290 views

Hamiltonian of charged particle in an EM field and magnetic field does no work on charged particles

2 votes
1 answer
158 views

Use of a geometric series sum in derivation of Bose-Einstein distribution

2 votes
1 answer
260 views

Physical interpretation of total derivative

2 votes
2 answers
293 views

Does "adding a constant to the potential energy" imply "adding a total time derivative to the Lagrangian."

2 votes
1 answer
168 views

Is Goldstein's matrix formalism to Hamiltonian mechanics necessary? [closed]

2 votes
1 answer
253 views

Plane pendulum at an angle (Goldstein 12.11) [closed]

2 votes
1 answer
173 views

Field theory Euler-Lagrange problem term

1 vote
1 answer
140 views

Scalar fields and spinors in 0+1D

1 vote
0 answers
70 views

Generalizing creation and annihilation operators to multiple field Lagrangian

1 vote
1 answer
205 views

Spectral density of fluctuations (white noise/delta-correlated process)

1 vote
1 answer
72 views

Hit rate of molecules on a wall

1 vote
0 answers
50 views

How do the radius and the center of the circular orbits of a particle depend on an adiabatically changing $B$ field [closed]

1 vote
1 answer
48 views

Properly accounting for indistinguishability of (homonuclear) diatomic molecules in "internal" partition function

1 vote
1 answer
92 views

Underdetermined system of equations for infinite parallel plates?

1 vote
1 answer
213 views

2-body problem, conservative central force, spherical symmetry, conversation of angular momentum, motion in a plane

1 vote
1 answer
248 views

Deviations from purely circular orbit for an object in a Yukawa potential

1 vote
2 answers
140 views

Validity of a differing frame of reference than that used in Landau and Lifshitz's solution [closed]

1 vote
2 answers
132 views

Euler-Lagrange partial with respect to $r$ of a dot product involing velocity and a vector potential [closed]

1 vote
1 answer
110 views

Reference request for Lie algebras

1 vote
0 answers
68 views

Error with generators of Lorentz group (basis of Lorentz Lie algebra) [closed]

1 vote
0 answers
59 views

Entropy and observers