In the path integral formulation of quantum theory, the Dirac probability amplitude: x_2,t_2|x_1,t_1 "corresponds to" exp = exp (1) where L is the classical...

Problem: An electron and a positron annihilate to produce a pair of photons which move in two specific directions. Now the question is what really transports the information...

It would be greatly appreciated if this announcement could be shared with individuals whose research interests include scientific computing. Thanks. ------- ...

A question about neutrino oscillations - what justifies the use of energy eigenstates in calculating the oscillation rate? The derivation of the oscillation rate as...

On Feb 6, 8:18 am, (John Baez) wrote: ... I also want to start a new blog, since the n-Category Cafe is not the optimal place...

During the past several months there have been discussions here regarding path integration and the extent to which it does, or does, not, provide a rigorous foundation for...

In the separate thread "Quantum Field Theory: The Big, Simple Picture?" which I earlier initiated, an excellent discussion emerged, largely involving Dr. Neumaier, Igor,...

dlzc wrote: For the uninitiated: the article in question is "THE HARD X-RAY VIEW OF REFLECTION, ABSORPTION, AND THE DISK-JET CONNECTION IN THE RADIO-LOUD AGN 3C 33"; D....

I have been trying to find a generalized expression for the multiple derivatives of a Gaussian. Gaussian functions of course have many application in physics and math, and...

If one were to take the position that chirality is present in all observable systems and states even without a measurement or direct observation - much like temperature,...

] i posted this to sci.physics.foundations with absolutely no response. so i'll try here (if the moderator accepts it). can we parse a little the discussion we see (say, on...

I have a few questions about the so-called "heat kernel" discussed in http://en.wikipedia.org/wiki/Dirac_delta_function#Semigroups. This article suggests that the heat...

On Jan 31, 4:24 pm, "Richard D. Saam" wrote (In relation to nuclear reaction rates for BBN) at...

Yousuf Khan wrote: Submitted to SPR as well. Likely attract better discussion - or nothing. In most galaxies, their central blackhole's axis is pretty much aligned ...

At the Cosmic Variance Blog someone posted a comment in the form of a question: "Is spacetime a 4-D manifold?" It reminded me of Einstein's comment that the idea of...

Chalky wrote: ] On Jan 21, 5:10 pm, "Richard D. Saam" wrote: It does not appear that this discussion cannot be resolved unless the actual...

Special Session on Computational Physics: Draft paper submission deadline is extended The above special session will be held as part of 2010 multi- conference (MULTICONF-10)...

---------- Forwarded message ---------- Date: 31 Jan 2010 19:13:40 GMT From: "Jonathan Thornburg " To:...

I read when a radio transmitter is watered at its base its signal is made stronger. What is the physics uses for this? Will ariel (antenna) set in water help its ability to...

Hi, Bragg condition regrading x ray scattering from a lattice states that sin(teta) = m*lambda/2*d where d is a distance between different planes in the lattice. Now, I was...