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-rw-r--r--src/wolff.c79
1 files changed, 51 insertions, 28 deletions
diff --git a/src/wolff.c b/src/wolff.c
index 97d1625..40a88e6 100644
--- a/src/wolff.c
+++ b/src/wolff.c
@@ -8,12 +8,13 @@ int main(int argc, char *argv[]) {
lattice_t lat;
uint16_t L;
uint32_t min_runs, lattice_i, sim_i;
- uint64_t N, n;
+ uint64_t N, n, W;
double T, H, eps;
sim = WOLFF;
L = 128;
N = 100000000000000;
+ W = 10;
n = 3;
lat = SQUARE_LATTICE;
use_dual = false;
@@ -25,11 +26,14 @@ int main(int argc, char *argv[]) {
output_state = false;
min_runs = 10;
- while ((opt = getopt(argc, argv, "n:N:L:T:H:m:e:oq:DMas:")) != -1) {
+ while ((opt = getopt(argc, argv, "n:N:L:T:H:m:e:oq:DMas:W:")) != -1) {
switch (opt) {
case 'N':
N = (uint64_t)atof(optarg);
break;
+ case 'W':
+ W = (uint64_t)atof(optarg);
+ break;
case 'n':
n = (uint64_t)atof(optarg);
break;
@@ -128,7 +132,7 @@ int main(int argc, char *argv[]) {
uint64_t n_steps = 0;
double clust_per_sweep = 0;
- meas_t *M, *aM, *eM, *mM, *E, *eE, *mE, *corrE, *corrmE;
+ meas_t *M, *aM, *eM, *mM, *E, *eE, *mE, *clust;
M = calloc(1, sizeof(meas_t));
aM = calloc(1, sizeof(meas_t));
@@ -137,16 +141,18 @@ int main(int argc, char *argv[]) {
E = calloc(1, sizeof(meas_t));
eE = calloc(1, sizeof(meas_t));
mE = calloc(1, sizeof(meas_t));
+ clust = calloc(1, sizeof(meas_t));
- corrE = (meas_t *)calloc(1, sizeof(meas_t));
- corrmE = (meas_t *)calloc(1, sizeof(meas_t));
- double batch_mean_energy;
- uint64_t batch_size = exp(0.667 * log(N));
- uint64_t n_batch = 0;
- uint64_t batch_flips = 0;
+ autocorr_t *autocorr;
+ if (record_autocorrelation) {
+ autocorr = (autocorr_t *)calloc(1, sizeof(autocorr_t));
+ autocorr->W = W;
+ autocorr->OO = (double *)calloc(W, sizeof(double));
+ autocorr->Op = (double *)calloc(W, sizeof(double));
+ }
printf("\n");
- while (((diff > eps || diff != diff) && n_steps < N) || n_runs < min_runs) {
+ while (((diff > eps || diff != diff) && n_runs < N) || n_runs < min_runs) {
printf("\033[F\033[JWOLFF: sweep %" PRIu64
", dH/H = %.4f, dM/M = %.4f, dC/C = %.4f, dX/X = %.4f, cps: %.1f\n",
n_runs, fabs(E->dx / E->x), M->dx / M->x, E->dc / E->c, M->dc / M->c, clust_per_sweep);
@@ -158,20 +164,11 @@ int main(int argc, char *argv[]) {
uint32_t tmp_flips = wolff_step(T, H, s, sim, r, bond_probs);
n_flips += tmp_flips;
n_clust++;
+ n_steps++;
- n_steps += tmp_flips;
-
- if (n_runs > 0 && record_autocorrelation) {
- update_meas(corrE, s->H);
- if (batch_flips <= batch_size && batch_flips + tmp_flips > batch_size) {
- update_meas(corrmE, batch_mean_energy / n_batch);
- batch_mean_energy = 0;
- n_batch = 0;
- batch_flips = (int64_t)(batch_flips + tmp_flips) - (int64_t)batch_size;
- }
- batch_mean_energy += s->H;
- n_batch++;
- batch_flips += tmp_flips;
+ if (record_autocorrelation && n_runs > 0) {
+ update_autocorr(autocorr, s->H);
+ update_meas(clust, tmp_flips);
}
}
@@ -209,15 +206,42 @@ int main(int argc, char *argv[]) {
FILE *outfile = fopen("out.dat", "a");
- double tau = batch_size * corrmE->c / corrE->c;
+ double tau = 0;
+ double dtau = 0;
+ if (record_autocorrelation) {
+ double kappa = rho(autocorr, W - 1) / rho(autocorr, W - 2);
+ double R = rho(autocorr, W - 1) / (1-kappa);
+
+ double ttau = 0.5 + R;
+ double X = 0.5;
+ double Y = 0;
+ for (uint64_t i = 0; i < W - 1; i++) {
+ ttau += rho(autocorr, i);
+ X += pow(rho(autocorr, i), 2);
+ if (i > 0) {
+ Y += 0.5 * pow(rho(autocorr, i) - rho(autocorr, i-1), 2);
+ } else {
+ Y += 0.5 * pow(rho(autocorr, i) - 1, 2);
+ }
+ }
+
+ double dttau = sqrt(4.0 / autocorr->n * (pow(ttau, 2) * (W +(1+kappa)/(1-kappa)-0.5) + kappa * X / pow(1-kappa, 2) + pow(kappa, 2) * Y / pow(1-kappa, 4)));
+
+ free(autocorr->OO);
+ free(autocorr->Op);
+ free(autocorr);
+
+ tau = ttau * clust->x / h->nv;
+ dtau = tau * sqrt(pow(dttau / ttau, 2) + pow(clust->dx / clust->x, 2));
+ }
fprintf(outfile,
- "%u %.15f %.15f %" PRIu64 " %" PRIu64 " %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %" PRIu64 " %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %" PRIu64 " %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f\n",
+ "%u %.15f %.15f %" PRIu64 " %" PRIu64 " %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %" PRIu64 " %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %" PRIu64 " %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f %.15f\n",
L, T, H, n_runs, n_steps,
E->x / h->nv, E->dx / h->nv, M->x / h->nv, M->dx / h->nv, E->c / h->nv, E->dc / h->nv, M->c / h->nv, M->dc / h->nv,
eE->n, eE->x / h->nv, eE->dx / h->nv, eM->x / h->nv, eM->dx / h->nv, eE->c / h->nv, eE->dc / h->nv, eM->c / h->nv, eM->dc / h->nv,
mE->n, mE->x / h->nv, mE->dx / h->nv, mM->x / h->nv, mM->dx / h->nv, mE->c / h->nv, mE->dc / h->nv, mM->c / h->nv, mM->dc / h->nv,
- aM->x / h->nv, aM->dx / h->nv, aM->c / h->nv, aM->dc / h->nv, tau);
+ aM->x / h->nv, aM->dx / h->nv, aM->c / h->nv, aM->dc / h->nv, tau, dtau);
fclose(outfile);
if (output_state) {
@@ -240,8 +264,7 @@ int main(int argc, char *argv[]) {
free(E);
free(eE);
free(mE);
- free(corrE);
- free(corrmE);
+ free(clust);
free(bond_probs);
graph_free(h);