Weekly update week 6, Feb 3-7

Dear All,

this week we went through (from an overarching point of view) importance sampling with a brief discussion on the Fokker-Planck equation and the Langevin equation. The slides at for example

http://compphysics.github.io/ComputationalPhysics2/doc/pub/vmc/html/vmc.html

contain more information about the derivation of the Fokker-Planck equation and the Langevin equations. This material is normally covered in more specialized courses on statistical mechanics and transport theories. For those of you who wish to read more, Gardiner's text is an excellent read, see https://www.springer.com/us/book/9783540707127?gclid=CjwKCAiAj-_xBRBjEiwAmRbqYobZnxz4xTWT4zB2P9hbHakA9JopxeGcuVvy-qRYVQ_lah9SVrEMDRoCUWUQAvD_BwE#otherversion=9783642089626 may be of interest.

Else, we recommend strongly that you go through the details in the above lecture slides on how to optimize your calculations of the ratio of wave functions  in the metropolis and the first and second derivatives of the trial wave functions. These are all ingredients which are CPU sinks. An efficient implementation saves CPU cycles.

Finally, the video of the lecture and the hand written notes are also availbale at the official UiO site of FYS4411.

Best wishes to you all,

Morten and Øyvind