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Scale momentum convention to CPS/UKQCD MD time

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This commit is contained in:
Peter Boyle 2019-04-17 11:54:17 +01:00
parent f4723e07c5
commit 3e712fe643
1 changed files with 10 additions and 2 deletions
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12
Grid/qcd/action/gauge/GaugeImplTypes.h
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@ -29,6 +29,14 @@ directory
#ifndef GRID_GAUGE_IMPL_TYPES_H
#define GRID_GAUGE_IMPL_TYPES_H
#define CPS_MD_TIME
#ifdef CPS_MD_TIME
#define HMC_MOMENTUM_DENOMINATOR (2.0)
#else
#define HMC_MOMENTUM_DENOMINATOR (1.0)
#endif
namespace Grid {
namespace QCD {
@ -105,13 +113,13 @@ public:
//
// Expect cxmua variance sqrt(2).
//
// Must scale the momentum by sqrt(2) up to invoke CPS and UKQCD conventions
// Must scale the momentum by sqrt(2) to invoke CPS and UKQCD conventions
//
LinkField Pmu(P._grid);
Pmu = Zero();
for (int mu = 0; mu < Nd; mu++) {
SU<Nrepresentation>::GaussianFundamentalLieAlgebraMatrix(pRNG, Pmu);
RealD scale = ::sqrt(2) ;
RealD scale = ::sqrt(HMC_MOMENTUM_DENOMINATOR) ;
Pmu = Pmu*scale;
PokeIndex<LorentzIndex>(P, Pmu, mu);
}