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Scalar: more action generalisation

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This commit is contained in:
Antonin Portelli 2017-10-03 14:26:20 +01:00
parent a021933002
commit 05c1c88440
1 changed files with 8 additions and 6 deletions
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14
lib/qcd/action/scalar/ScalarInteractionAction.h
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@ -46,6 +46,7 @@ public:
private: private:
RealD mass_square; RealD mass_square;
RealD lambda; RealD lambda;
RealD g;
const unsigned int N = Impl::Group::Dimension; const unsigned int N = Impl::Group::Dimension;
typedef typename Field::vector_object vobj; typedef typename Field::vector_object vobj;
@ -57,7 +58,7 @@ private:
std::vector<int> displacements; // = {1,1,1,1, -1,-1,-1,-1}; std::vector<int> displacements; // = {1,1,1,1, -1,-1,-1,-1};
public: public:
ScalarInteractionAction(RealD ms, RealD l) : mass_square(ms), lambda(l), displacements(2 * Ndim, 0), directions(2 * Ndim, 0) ScalarInteractionAction(RealD ms, RealD l, RealD gval) : mass_square(ms), lambda(l), g(gval), displacements(2 * Ndim, 0), directions(2 * Ndim, 0)
{ {
for (int mu = 0; mu < Ndim; mu++) for (int mu = 0; mu < Ndim; mu++)
{ {
@ -73,6 +74,7 @@ public:
std::stringstream sstream; std::stringstream sstream;
sstream << GridLogMessage << "[ScalarAction] lambda : " << lambda << std::endl; sstream << GridLogMessage << "[ScalarAction] lambda : " << lambda << std::endl;
sstream << GridLogMessage << "[ScalarAction] mass_square : " << mass_square << std::endl; sstream << GridLogMessage << "[ScalarAction] mass_square : " << mass_square << std::endl;
sstream << GridLogMessage << "[ScalarAction] g : " << g << std::endl;
return sstream.str(); return sstream.str();
} }
@ -86,8 +88,8 @@ public:
static Stencil phiStencil(p._grid, npoint, 0, directions, displacements); static Stencil phiStencil(p._grid, npoint, 0, directions, displacements);
phiStencil.HaloExchange(p, compressor); phiStencil.HaloExchange(p, compressor);
Field action(p._grid), pshift(p._grid), phisquared(p._grid); Field action(p._grid), pshift(p._grid), phisquared(p._grid);
phisquared = p*p; phisquared = p * p;
action = (2.*Ndim + mass_square) * phisquared - phisquared * phisquared; action = (2.0 * Ndim + mass_square) * phisquared - lambda * phisquared * phisquared;
for (int mu = 0; mu < Ndim; mu++) for (int mu = 0; mu < Ndim; mu++)
{ {
// pshift = Cshift(p, mu, +1); // not efficient, implement with stencils // pshift = Cshift(p, mu, +1); // not efficient, implement with stencils
@ -122,13 +124,13 @@ public:
} }
// NB the trace in the algebra is normalised to 1/2 // NB the trace in the algebra is normalised to 1/2
// minus sign coming from the antihermitian fields // minus sign coming from the antihermitian fields
return -(TensorRemove(sum(trace(action)))).real()*N/lambda; return -(TensorRemove(sum(trace(action)))).real()*N/g;
}; };
virtual void deriv(const Field &p, Field &force) virtual void deriv(const Field &p, Field &force)
{ {
assert(p._grid->Nd() == Ndim); assert(p._grid->Nd() == Ndim);
force = (2.0 * Ndim + mass_square) * p - 2. * p * p * p; force = (2. * Ndim + mass_square) * p - 2. * lambda * p * p * p;
// move this outside // move this outside
static Stencil phiStencil(p._grid, npoint, 0, directions, displacements); static Stencil phiStencil(p._grid, npoint, 0, directions, displacements);
phiStencil.HaloExchange(p, compressor); phiStencil.HaloExchange(p, compressor);
@ -163,7 +165,7 @@ public:
} }
} }
} }
force *= N/lambda; force *= N/g;
} }
}; };