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bug in wilson eigenvectors: ritz estimates not equalling deviation from being an evec

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This commit is contained in:
Patrick Oare
2025-10-31 15:31:46 +00:00
parent 4042ebf1bf
commit bf2a715ef7
3 changed files with 421 additions and 20 deletions
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54
examples/Example_wilson_spectrum.cc
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@@ -105,8 +105,9 @@ void writeEigensystem(KrylovSchur<Field> KS, std::string outDir) {
fEval.close();
// Write evecs
int Nevecs = Nk; // don't write all of them
std::vector<Field> evecs = KS.getEvecs();
for (int i = 0; i < Nk; i++) {
for (int i = 0; i < Nevecs; i++) {
std::string fName = outDir + "/evec" + std::to_string(i);
writeFile(evecs[i], fName); // using method from Grid/HMC/ComputeWilsonFlow.cc
}
@@ -269,13 +270,16 @@ int main (int argc, char ** argv)
std::string file = argv[5];
std::string outDir = argv[6];
RitzFilter RF;
if (argc == 8) {
std::string rf = argv[7];
RF = selectRitzFilter(rf);
} else {
RF = EvalReSmall;
}
// RitzFilter RF;
// if (argc == 8) {
// std::string rf = argv[7];
// RF = selectRitzFilter(rf);
// } else {
// RF = EvalReSmall;
// }
// RitzFilter RF;
std::string rf = argv[7];
RitzFilter RF = selectRitzFilter(rf);
std::cout << "Sorting eigenvalues using " << rfToString(RF) << std::endl;
const int Ls=16;
@@ -288,8 +292,10 @@ int main (int argc, char ** argv)
GridDefaultSimd(Nd,vComplex::Nsimd()),
GridDefaultMpi());
GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
// GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
// GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
GridCartesian * FGrid = UGrid;
GridRedBlackCartesian * FrbGrid = UrbGrid;
std::vector<int> seeds4({1,2,3,4});
GridParallelRNG RNG4(UGrid);
@@ -303,21 +309,30 @@ int main (int argc, char ** argv)
std::cout << GridLogMessage << "Loaded configuration" << std::endl;
RealD mass = 0.01;
// RealD mass = 0.01;
RealD M5 = 1.8;
// Wilson mass
RealD mass = -1.6;
std::cout << GridLogMessage << "masses specified" << std::endl;
// Define domain wall D. This is giving a floating point exception?
DomainWallFermionD Ddwf(Umu, *FGrid, *FrbGrid, *UGrid, *UrbGrid, mass, M5);
NonHermitianLinearOperator<DomainWallFermionD, LatticeFermionD> DLinOp (Ddwf);
std::vector<Complex> boundary = {1,1,1,-1};
WilsonFermionD::ImplParams Params(boundary);
std::cout << GridLogMessage << "DWF operator defined" << std::endl;
// DomainWallFermionD Ddwf(Umu, *FGrid, *FrbGrid, *UGrid, *UrbGrid, mass, M5);
// NonHermitianLinearOperator<DomainWallFermionD, LatticeFermionD> DLinOp (Ddwf);
// WilsonFermionD Dwilson(Umu, *FGrid, *FrbGrid, mass);
WilsonFermionD Dwilson(Umu, *UGrid, *UrbGrid, mass, Params);
NonHermitianLinearOperator<WilsonFermionD, LatticeFermionD> DLinOp (Dwilson);
std::cout << GridLogMessage << "Dirac operator defined" << std::endl;
// Define PV^dag D (if we want)
DomainWallFermionD Dpv(Umu, *FGrid, *FrbGrid, *UGrid, *UrbGrid, 1.0, M5);
typedef PVdagMLinearOperator<DomainWallFermionD,LatticeFermionD> PVdagM_t;
PVdagM_t PVdagM(Ddwf, Dpv);
// DomainWallFermionD Dpv(Umu, *FGrid, *FrbGrid, *UGrid, *UrbGrid, 1.0, M5);
// typedef PVdagMLinearOperator<DomainWallFermionD,LatticeFermionD> PVdagM_t;
// PVdagM_t PVdagM(Ddwf, Dpv);
std::cout<<GridLogMessage<<std::endl;
std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
@@ -338,6 +353,9 @@ int main (int argc, char ** argv)
KrylovSchur KrySchur (DLinOp, FGrid, 1e-8, RF); // use Ddwf
KrySchur(src, maxIter, Nm, Nk, Nstop);
std::cout << GridLogMessage << "Checking eigensystem." << std::endl;
KrySchur.checkRitzEstimate();
std::cout<<GridLogMessage << "*******************************************" << std::endl;
std::cout<<GridLogMessage << "***************** RESULTS *****************" << std::endl;
std::cout<<GridLogMessage << "*******************************************" << std::endl;