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Started a tidy up in the HMC sector. Now comfortable with the two level integrators;

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to a little figure out what Guido had done & why -- but there is a neat saving of force
evaluations across the nesting time boundary making use of linearity of the leapP in dt.

I cleaned up the printing, reduced the volume of code, in the process sharing printing
between all integrators. Placed an assert that the total integration time for all integrators
must match at end of trajectory.

Have now verified e-dH = 1 for nested integrators in Wilson/Wilson runs with both
Omelyan and with Leapfrog so substantial confidence gained.
This commit is contained in:
Peter Boyle
2015-08-29 17:18:43 +01:00
parent dc814f30da
commit 76d752585b
12 changed files with 241 additions and 107 deletions
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3
lib/qcd/hmc/HMC.h
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@ -103,8 +103,7 @@ namespace Grid{
// Actual updates (evolve a copy Ucopy then copy back eventually)
LatticeGaugeField Ucopy(Uin._grid);
for(int iter=Params.StartingConfig;
iter < Params.Nsweeps+Params.StartingConfig; ++iter){
for(int iter=Params.StartingConfig; iter < Params.Nsweeps+Params.StartingConfig; ++iter){
std::cout<<GridLogMessage << "-- # Sweep = "<< iter << "\n";
Ucopy = Uin;