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More precision in rect force test

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This commit is contained in:
Peter Boyle 2019-02-24 15:21:19 +00:00
parent 7c461dc664
commit a9a3248cb5
1 changed files with 11 additions and 3 deletions
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14
tests/forces/Test_rect_force.cc
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@ -57,9 +57,10 @@ int main (int argc, char ** argv)
SU3::HotConfiguration(pRNG,U);
double beta = 1.0;
double c1 = 0.331;
double c1 = -0.331;
PlaqPlusRectangleActionR Action(beta,c1);
IwasakiGaugeActionR Action(beta);
// PlaqPlusRectangleActionR Action(beta,c1);
// WilsonGaugeActionR Action(beta);
ComplexD S = Action.S(U);
@ -87,7 +88,13 @@ int main (int argc, char ** argv)
// fourth order exponential approx
parallel_for(auto i=mom.begin();i<mom.end();i++){ // exp(pmu dt) * Umu
Uprime[i](mu) = U[i](mu) + mom[i](mu)*U[i](mu)*dt ;
Uprime[i](mu) = U[i](mu) + mom[i](mu)*U[i](mu)*dt
+ mom[i](mu) *mom[i](mu) *U[i](mu)*(dt*dt/2.0)
+ mom[i](mu) *mom[i](mu) *mom[i](mu) *U[i](mu)*(dt*dt*dt/6.0)
+ mom[i](mu) *mom[i](mu) *mom[i](mu) *mom[i](mu) *U[i](mu)*(dt*dt*dt*dt/24.0)
+ mom[i](mu) *mom[i](mu) *mom[i](mu) *mom[i](mu) *mom[i](mu) *U[i](mu)*(dt*dt*dt*dt*dt/120.0)
+ mom[i](mu) *mom[i](mu) *mom[i](mu) *mom[i](mu) *mom[i](mu) *mom[i](mu) *U[i](mu)*(dt*dt*dt*dt*dt*dt/720.0);
}
}
@ -114,6 +121,7 @@ int main (int argc, char ** argv)
}
ComplexD dSpred = sum(dS);
std::cout << std::setprecision(15)<<std::endl;
std::cout << GridLogMessage << " S "<<S<<std::endl;
std::cout << GridLogMessage << " Sprime "<<Sprime<<std::endl;
std::cout << GridLogMessage << "dS "<<Sprime-S<<std::endl;