Notes on Chroma

Notes on Chroma

From the creators of the code:

Chroma Tutorial from HackLatt2006 by Bálint Joó.

pdf (readable) format files modified from the directory in the chroma/docs/notes/

Note that the code is still alive; meaning users are updating them everyday! Thanks to the smart scripts, all the new codes are checked with the old output by 3am everyday! However, these instructions aren't.

Huey-Wen's notes:
Getting to learn how to use chorma code is easy! Most of the example input xml files are under src/chroma/tests/chroma/ and they are updated regularly whenever the new version of the measurement code is added into the chroma. One only need a good scale of copy-paste and pattern organization skill to use chroma.

Basic Structure of input xml file
(This is the frame work that needed to be included in for every measurement.)

Hadron spectrum measurement
(Calculate most of the meson and baryon spectrum)

        MAKE_SOURCE
        PROPAGATOR
        SINK_SMEAR
        HADRON_SPECTRUM

Matrix elements

(Compose 3pt point fiction with all possible gamma insertion and displacement)

        MAKE_SOURCE
        PROPAGATOR
        SEQSOURCE
        BUILDING_BLOCKS

Gauge fixing
(Work for both Coulomb and Landau gauge fixing)
    Coulomb gauge fixing example

Write out configuration
(Use QIO to write out the gauge configurations)