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Oct
31
comment Is the third spin vector of a photon always suppressed?
@WetSavannaAnimal aka Rod Vance Electromagnetic waves in waveguides propagate in TE and TM modes where either the magnetic the electric field have components along the direction of propagation.
Oct
31
answered Is the third spin vector of a photon always suppressed?
Oct
30
answered For the $U(1)$ problem, is the Kugo and Ojima Goldstone quartet wrong?
Oct
25
comment What are orbifolds and why are they useful and interesting for physics?
@Nick Kidman $\mathbb{C}^2/~$: $\theta$ ~ $\theta + \alpha$
Oct
25
revised What are orbifolds and why are they useful and interesting for physics?
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Oct
25
answered What are orbifolds and why are they useful and interesting for physics?
Oct
24
revised Topological Mass Generation Mechanism
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Oct
24
revised Topological Mass Generation Mechanism
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Oct
24
revised Topological Mass Generation Mechanism
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Oct
24
answered Topological Mass Generation Mechanism
Oct
22
revised Magnetic field lines and knots
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Oct
22
answered Magnetic field lines and knots
Oct
21
awarded  Revival
Oct
20
revised Why are there no particles in conformal theories?
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Oct
20
answered Why are there no particles in conformal theories?
Oct
18
comment Spin tensor and Lorentz group operator in bispinor case
If the problem is a sign problem, please notice that the $\Psi$s are Grassmann variables and they acquire minus signs when they are commuted.
Oct
17
revised Is the Green function a prescription for a connection?
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Oct
17
answered Is the Green function a prescription for a connection?
Oct
17
answered A “Hermitian” operator with imaginary eigenvalues
Oct
16
answered Rank of the Poincare group