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#include <iostream>
#include <fstream>
#include "ising.hpp"
#include "quantity.hpp"
class Autocorrelation : public measurement<signed, D, TorusGroup<signed, D>, signed> {
public:
Quantity E;
Autocorrelation(unsigned lag) : E(lag) {}
void post_cluster(const isingModel& m) override {
double E_tmp = 0;
TorusGroup<signed, D> s0Inv = m.s0.inverse();
for (const isingSpin* si : m.s) {
E_tmp -= m.B(s0Inv.act(*si));
for (const isingSpin* sj : m.dict.neighbors(si->x)) {
if (si != sj) {
E_tmp -= m.Z(*si, *sj) / 2;
}
}
}
E.add(E_tmp);
}
};
int main(int argc, char* argv[]) {
unsigned L = 32;
unsigned N = 1000;
unsigned mod = 0;
unsigned multi = 1e4;
double mag = 0.5;
double pop = 1.0;
double T = 2.0 / log(1.0 + sqrt(2.0));
double H = 1.0;
double ε = 0.1;
unsigned lag = 1e2;
int opt;
while ((opt = getopt(argc, argv, "N:L:T:H:e:m:M:r:p:l:")) != -1) {
switch (opt) {
case 'N':
N = (unsigned)atof(optarg);
break;
case 'L':
L = atoi(optarg);
break;
case 'T':
T = atof(optarg);
break;
case 'H':
H = atof(optarg);
break;
case 'e':
ε = atof(optarg);
break;
case 'm':
mod = atoi(optarg);
break;
case 'M':
multi = atoi(optarg);
break;
case 'r':
mag = atof(optarg);
break;
case 'p':
pop = atof(optarg);
break;
case 'l':
lag = (unsigned)atof(optarg);
break;
default:
exit(1);
}
}
isingModel ising(L, isingZ(L), isingBMod(L, mod, H));
isingPopulate(ising, L, pop, mag);
auto g = isingGen(L);
measurement<signed, D, TorusGroup<signed, D>, signed> A_empty;
ising.wolff(T, {g}, A_empty, N);
Autocorrelation A(lag);
while (true) {
ising.wolff(T, {g}, A, N);
std::array<double, 2> τ = A.E.τ();
std::cout << A.E.num_added() << " " << A.E.avg() << " " << τ[0] << " " << τ[1] << " " << τ[1] / τ[0] << "\n";
if (τ[1] / τ[0] < ε && τ[0] * multi < A.E.num_added()) {
break;
}
}
std::ofstream outfile;
outfile.open("out.dat", std::ios::app);
std::array<double, 2> act = A.E.τ();
std::vector<double> ρ = A.E.ρ();
outfile << L << " " << T << " " << mod << " " << H << " " << A.E.num_added() << " " <<
A.E.avg() << " " << A.E.serr() << " " << act[0] << " " << act[1]; for (double ρi : ρ) {
outfile << " " << ρi;
}
outfile << "\n";
return 0;
}
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