Natural Science Forum / Physics / Research / April 2007

Dear SPR friends:
I would like to pose several propositions about electric / magnetic
duality and see what people have to say:
1)  Is it fair to say that electric / magnetic "duality" is a symmetry

Electromagnetic waves can be put in a box and quantized and the
result is photons, but gluons seem to be a case of a box within a box
- gluons can emit gluons.Is there any evidence that photons can emit
photons - shouldn't the force carrying particles have more in common -

Here's a question about inequivalent representations of the CCRs...
For a given Hilbert space representation, what is it that determines
which set of field operators \phi(x), or \phi(f) if we want to get
rigorous a la Wightman, gives us THE field operators for that

I am NOT a physicist, but I am interested in particle physics.
Does the electron have a size or is it a "point" object? If so, its
density should be infinite since it has mass in a zero volume.
How do forces work at the sub-atomic level? If two electrons approach

In the analysis of sound waves generated in a pipe open at both ends
or open at one end only, the tube length is taken as L=L_0+0.3 D,
where L_0 is the actual tube length and D is the diameter of the tube.
Is this only a thumb rule? Or can a physical argument be given for the

For an Abelian Field strength F_uv, one can write the two-form, in polar
coordinates, as:
F = F_uv dx^u dx^v = - (g/4pi) sin theta d-theta d-phi    (1)
For a non-Abelian field strength F_i_uv where i is the index of the Yang

I have a cable and I send electric current through it. I want to know
the moment when the current has arrived at the other end of the cable.
Can I visualize this moment by using an oscilloscope ?
If the answer is yes, I have another question for a more complex

I thought I knew quite a lot about gravity, but I've just totally
confused myself when thinking about potential energy in good old
Newtonian gravity.
It's a standard result in Newtonian gravity that if two masses m_1 and

Greetings, I'm curious about the RS1 set up with a bulk fermion, such
as the Grossman-Neubert model for neutrino mass (hep-ph/9912408). In
short, my question is what sets the parity of the bulk fermion under
the Z^2 orbifold symmetry (phi -> -phi).

For anyone who has worked on Bohm's quantum theory:
Can Bohm's pilot waves become uncoupled from matter
(particles) and propagate freely in space?
Can such pilot waves interact with one another in

Hello everyone.  Would someone recommend to me a good expository
article that explains the gist of the spin-statistics theorem?  I am a
mathematician (algebraic topologist) who has been studying QM.  I've
gotten as far as going through some calculations of magnetic moments

I understand that A/C creates power like a water hose alternating
pressure back and forth.  I also see that the power plants' ground/
neutral is the other half of the supply which gets moved back and
forth.

I've taken course on Quantum Mechnics, and understand some basics of
that.
Now I have several questions:
1, I got the notion that an atom absorbs energy by pieces and only

I want to calculate a second-order-correlation-function with four
different times, i.e. G^2=Trace[rho.A*(t1)B*(t2)B(t3)A(t4)] (where
*...adjoint operator, rho...density matrix in the Schrödinger picture).
Unfortunately, I do not know how to do that.

Does anyone have a contact at a company or university that would be
wiling to test a possible new cuprate superconductor?
I am a private researcher/inventor that has fabricated a new cuprate
material, but no longer have a way of testing its Tc.  I can either