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5D free propagator for DWF and boundary conditions for free propagators

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This commit is contained in:
Vera Guelpers
2018-05-03 12:31:36 +01:00
parent 2700992ef5
commit 04190ee7f3
8 changed files with 311 additions and 18 deletions
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55
lib/qcd/action/fermion/DomainWallFermion.h
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@ -8,6 +8,7 @@
Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: Vera Guelpers <V.M.Guelpers@soton.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -42,8 +43,58 @@ namespace Grid {
INHERIT_IMPL_TYPES(Impl);
public:
void MomentumSpacePropagator(FermionField &out,const FermionField &in,RealD _m) {
this->MomentumSpacePropagatorHt(out,in,_m);
void FreePropagator(const FermionField &in,FermionField &out,RealD mass, std::vector<double> twist, bool fiveD) {
FermionField in_k(in._grid);
FermionField prop_k(in._grid);
FFT theFFT((GridCartesian *) in._grid);
//phase for boundary condition
ComplexField coor(in._grid);
ComplexField ph(in._grid); ph = zero;
FermionField in_buf(in._grid); in_buf = zero;
Complex ci(0.0,1.0);
assert(twist.size() == Nd);//check that twist is Nd
int shift = 0;
if(fiveD) shift = 1;
for(unsigned int nu = 0; nu < Nd; nu++)
{
// Shift coordinate lattice index by 1 to account for 5th dimension.
LatticeCoordinate(coor, nu + shift);
ph = ph + twist[nu]*coor*((1./(in._grid->_fdimensions[nu+shift])));
}
in_buf = exp((RealD)(2.0*M_PI)*ci*ph*(-1.0))*in;
if(fiveD){//FFT only on temporal and spatial dimensions
std::vector<int> mask(Nd+1,1); mask[0] = 0;
theFFT.FFT_dim_mask(in_k,in_buf,mask,FFT::forward);
this->MomentumSpacePropagatorHt_5d(prop_k,in_k,mass,twist);
theFFT.FFT_dim_mask(out,prop_k,mask,FFT::backward);
}
else{
theFFT.FFT_all_dim(in_k,in,FFT::forward);
this->MomentumSpacePropagatorHt(prop_k,in_k,mass,twist);
theFFT.FFT_all_dim(out,prop_k,FFT::backward);
}
//phase for boundary condition
out = out * exp((RealD)(2.0*M_PI)*ci*ph);
};
virtual void FreePropagator(const FermionField &in,FermionField &out,RealD mass,std::vector<double> twist) {
bool fiveD = true; //5d propagator by default
FreePropagator(in,out,mass,twist,fiveD);
};
virtual void FreePropagator(const FermionField &in,FermionField &out,RealD mass, bool fiveD) {
std::vector<double> twist(Nd,0.0); //default: periodic boundarys in all directions
FreePropagator(in,out,mass,twist,fiveD);
};
virtual void FreePropagator(const FermionField &in,FermionField &out,RealD mass) {
bool fiveD = true; //5d propagator by default
std::vector<double> twist(Nd,0.0); //default: periodic boundarys in all directions
FreePropagator(in,out,mass,twist,fiveD);
};
virtual void Instantiatable(void) {};