Recent content by Jacob

Thanks for the help. Unfortunately I only know unnormalised second and fourth moments of the distributions (which is why I need to divide the two!). I have two similar distributions which I would like to compare on the basis of the unnormalised second and fourth moments.

I've been told that there are useful interpretations of the ratios of moments of probability density distributions, such as <x^4>/<x^2>. I only have un-normalised values of the second and higher moments of the distribution of interest. Is there any way of quantifying the spatial extent of the...

Thanks :). Unfortunately it's the difference from k that's important as it is the exact spatial extent of the wavefunction which is of interest (it is a Dirac delta in the untransformed Foldy-Wouthuysen representation since it's a mean position eigenfunction and mean position = r in that...

Hi again, have I posted this in the right forum? If not please suggest where I'm most likely to get an answer! Otherwise I would be very grateful if anyone could tell me either how to Fourier transform: k\,{\sqrt{1+{\frac1{\sqrt{1+{k^2}}}}}} or that it is not possible to do so.

Mathematica can't calculate Fourier transform (Dirac mean position eigenfunction) Hi, I'm attempting to use Mathematica to calculate a mean-position eigenfunction of the Dirac equation. To do so I need to evaluate Fourier transforms (from p-space to r-space) of wavefunctions dependent on...