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