Natural Science Forum / Physics / Research / July 2005

Is it correct to state that a mass in uniform circular motion has a constant
DeBroglie wavelength because its angular momentum is constant? It seems to me
that otherwise lambda would eventually vanish to zero? On the other hand, how
could the change in the linear momentum of such a ...

Is there some way of putting a pseudoscalar particle (the pion, say)
and a fermion (the muon, say) in the same supersymmetric multiplet?
An other thing... sometimes superspace grassmanian coordinates are
described as "infinitesimal". Does it mean that we can get superspace

Classical Mechanics and Quantum Mechanics are examples of
the general Hamilton-Poisson mechanics
q' = {q,H}, (q' is the time derivative of q)
p' = {p,H},

I'd like to recommend a bit of summer reading from the good people at
the Princeton U Press, entitled 'Mathematics in Nature.'
Written by John A. Adams, Professor of Mathematics at Old Dominion U,
this handsome book offers a wealth of insight on topics drawn from all

i didn't see this in the sci.physics FAQ (which is awesome, btw), so
i'll just go ahead and ask: do photons, being energy, distort
spacetime, and thus interact gravitationally with massive particles and
each other?

This is a mainly mathematical question, but I posted some
physics-related questions right at the end.
I am trying to understand how the product of 2 or more exponentials of
linear combinations of generators of a lie group would yield a single

Atomic GR...?
Let's assume we're approaching a  "generic" neutral
isolated atom in a midget nano-craft. We intend to
measure Einstein's Law G_uv=T_uv as we tend into

Howdy,
I've been wondering lately if pseudo-random number generators of
computer science could occur naturally? I was thinking some processes
like flows of liquids with some velocity passed two cross-sections: say

Has the advent of Quantum Statistical Mechanics led to an
uncontroversial resolution of the paradox of Maxwell's Demon? If so,
what is the currently accepted solution?
Vonny N.

Dear Members,
on p.68 of Sakurai's "Modern Quantum Mechanics" we read "... Time
is just a parameter in quantum mechanics, not an operator. In
particular, Time is not an observable in the language of the previous

Author: Suresh K Maran (universalwatch.blogspot.com)
In one of my posting regarding critique of Lubos Motl of Loop quantum
gravity, I mentioned that the protectionist measures of string
theorists are preventing non-perturbative quantum gravity (loop quantum

Why isn't the constant force problem covered in Quantum Mechanics
texts?  I checked a dozen and found no reference, even in the very
thorough Messiah text.  I can find very little on the web.  One would
think that it would be first thing covered after the free particle.

Published at last -the paper on  information loss.Can any of the experts
say if it holds up
[ Mod. note: The paper can be found at
   http://arxiv.org/abs/hep-th/0507171

I'm trying to read "Brane Dimers and Quiver Gauge Theories"
hep-th/0504110. Can someone define the term quiver gauge theory for me
or refer me to an earlier hep-th paper where the term is defined?
Thanks! georgie

Is state-vector reduction (or collapse of the wavefunction) a physical
process? Or is it really an artefact of our procedure of canonical
quantisation?
In the Feynman path integral approach to Quantum Theory, state-vector