If one were to use the Einstein-Hilbert action in the usual expression for a path integral, where the metric tensor g_uv (or at least its gravitational field components...

I have a question that I have no seen asked before, let alone answered. It concerns the effect of quantum randomness (or at least, non deterministic randomness) on planetary...

Hello, can anyone point to preprints on compactification of M-theory down to 9 dimensions, via the sphere S2? I am curious about: - how should this compactification be...

In the linear approximation, the metric tensor g^uv is related to the gravitational field h^uv according to (k=sqrt(16 pi G)): g^uv = eta^uv + k h^uv (1) Further, the...

Dear all, A colleague of mine guesses that the time arrow is caused by the asymmetry of causality (cause and effect are not interchangeable), while the relationship to the...

Please do not reply to this post unless you have actually done the experiment. I am looking for first hand information, not something in a text book. In his Messenger...

] This is another in a series of articles I've recently posted on this topic. Here, I'm going to lay out the general framework and apply it to scalar fields to (a) show how...

I have often wondered if nano technology might allow for the development of a material that would soak up solar energy without focusing mirrors for some period of time . . ....

If you want to know why Einstein is wrong and why so many astronomers are making great fools of themselves this very moment, download my latest variable star program and see...

In flat spacetime, one may take the forward Fourier transform, for example, of a vector J^u, according to: J^u(k) = $ d^4x J^u(x) exp (1) Does this change at all in...

In an exercise linked at: http://jayryablon.files.wordpress.com/2009/11/exact-closed-form-calculation-for-quadratic-form-path-integrals.pdf I have sought to examine the...

In the file linked below, I have laid out an exercise upon which I would appreciate your...

Hi! I would like to hear from an experimental physicist who could help recommend a list of the minimum equipment needed to repeat some of the "classic" QM experiments, for...

From: Arnold Neumaier 2008 September...

On 31 Okt., 19:50, Rock Brentwood wrote: .... The action is obtained by summing over the "best" intermediate state S(q0,q2) = S(q0,q1) +...

While considering superconductors, it is generally accepted that there are created fluxons - some natural number of quantas of magnetic flux. I wanted to ask if the situation...

On Oct 22, 2:03*am, Koobee Wublee wrote: "There is no known formulation ofpathintegralsto curvedspacetimes." In reply to Yablon's question --...

The question, more precisely, is this: starting out with classical theory, allow for interactions and/or propagation along spacelike intervals and then pose a "no information...

Hi I planning some experiments for which I need special cut quartz crystals. Does anyone know where one can buy a machine for cutting quartz ? Thanks. Knud

I've nominated the Wikipedia article "Speed of light" (http://en.wikipedia.org/wiki/Speed_of_light) for peer review, and another Wikipedian suggested to contact other people...