On the equatorial plane of the Kerr geometry, there are three quantities that are identical to the equivalent quantities in the Schwarzschild geometry: (1) The transverse...

A 10 dimensional spinor has 8 degrees of freedom (it is Weyl- Majorana), and the Standard Model fermions sum 96 degrees of freedom. So 12 fermions of 8 degree of freedom...

Hi group, I wonder how maximal optical broadband-diffusion in the wavelengths of infrared-to-UV is currently achieved. Convex surfaces? And for what practical applications...

Can someone please explain or provide some links which explain how the physics of a non-symmetric energy tensor would be different from that of a symmetric energy...

The blog of lieven le bruyn has two entries this week about Leech lattice and...

Hello, One says that an odd derivation d is a differential modulo another differential d' if this two things hold: =0 d^2=- for some d" - The first condition says that d...

I guess there are two essentially equivalent formulations of the exterior covariant deriviative depending on whether one likes to work with principal bundles or prefers to...

An isolated electron (magnetic moment mu) in motion in a uniform magnetostatic field of magnitude, B, has a potential energy, U, within the range -mu B U mu B. If U is...

I am looking for a source which explicitly states the relation between the Bohr-Sommerfeld quantization conditions and the integrality condition in the geometric quantization...

I was wondering if anyone knows of systems for which the Hamiltonian is not equal to the total energy? This is an interesting problem in analytic mechanics (e.g. Lagrangian...

I'm looking to solve the time-dependent Schrodinger equition for a particle in a time-dependent periodic potential. So the Hamiltonian looks like: H = H_0 + eVcos(wt) where...

Hello, I have a questions about light cones in space-time. Let's consider 4 events, E1,E2,E3,E4 and take them as origin of 4 light cones. Then, consider the intersections of...

If I look at a simple chronology for the Big Bang, I see that there's a period between the advent of the big bang and then maybe a few million years out where there's enough...

Is there example that a QFT is consistent perturbatively, but inconsistent nonperturbatively?

In the Principia Newton defined time and space for physics: quote I. Absolute, true, and mathematical time, of itself, and from its own nature, flows equably without...

calculating the intensity of line spectra of atoms located on the periodic table tia sal2 How can I calculate the intensity of each line spectra of Sodium atoms located on...

Could one use X-ray photons to produce interference patterns with de Broglie matter waves, e.g., of Helium? X-rays have an EM wavelength in the .1 Nm range. Cold Helium...

Dear Collegues, my open quantum system research led me to a mathematical problem that I can't seem to solve without some help. I need the statistical moments of certain...

More of a mad idea. Some while ago I posted the suggestion that uncertainty in QM might be conserved in some way. The basis for this suggestion was this idea. Suppose we...

This famous paradox is about the distance between two identicaly accelerating rockets starting from rest from an inertial lab frame. It is described i.e...