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authorJaron Kent-Dobias <jaron@kent-dobias.com>2018-07-19 11:33:26 -0400
committerJaron Kent-Dobias <jaron@kent-dobias.com>2018-07-19 11:33:26 -0400
commit07bfd781266868ee6bac8e2b58f9675b3536354d (patch)
tree8a073e0e89d10022bc5432dd8439829c4b35dd43 /src
parent8a9793881d3dfa13440c516691144fd6cefa29db (diff)
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added modulated field to wolff_planar
Diffstat (limited to 'src')
-rw-r--r--src/wolff_heisenberg.cpp14
-rw-r--r--src/wolff_planar.cpp61
2 files changed, 55 insertions, 20 deletions
diff --git a/src/wolff_heisenberg.cpp b/src/wolff_heisenberg.cpp
index ad3f3c6..e05453f 100644
--- a/src/wolff_heisenberg.cpp
+++ b/src/wolff_heisenberg.cpp
@@ -4,7 +4,7 @@
#include <correlation.h>
#include <wolff.h>
-typedef state_t <orthogonal_t <3, double>, vector_t <3, double>> sim_t;
+typedef state_t <orthogonal_t <3, double>, vector_t <3, double>> heisenberg_t;
int main(int argc, char *argv[]) {
@@ -63,7 +63,7 @@ int main(int argc, char *argv[]) {
timestamp = spec.tv_sec*1000000000LL + spec.tv_nsec;
}
- std::function <orthogonal_t <3, double>(gsl_rng *, const sim_t *)> gen_R;
+ std::function <orthogonal_t <3, double>(gsl_rng *, const heisenberg_t *)> gen_R;
const char *pert_type;
@@ -110,20 +110,20 @@ int main(int argc, char *argv[]) {
free(filename_S);
free(filename_X);
- std::function <void(const sim_t *)> *measurements = (std::function <void(const sim_t *)> *)malloc(4 * sizeof(std::function <void(const sim_t *)>));
+ std::function <void(const heisenberg_t *)> *measurements = (std::function <void(const heisenberg_t *)> *)malloc(4 * sizeof(std::function <void(const heisenberg_t *)>));
- measurements[0] = [&](const sim_t *s) {
+ measurements[0] = [&](const heisenberg_t *s) {
float smaller_E = (float)s->E;
fwrite(&smaller_E, sizeof(float), 1, outfile_E);
};
- measurements[1] = [&](const sim_t *s) {
+ measurements[1] = [&](const heisenberg_t *s) {
float smaller_X = (float)correlation_length(s);
fwrite(&smaller_X, sizeof(float), 1, outfile_X);
};
- measurements[2] = [&](const sim_t *s) {
+ measurements[2] = [&](const heisenberg_t *s) {
write_magnetization(s->M, outfile_M);
};
- measurements[3] = [&](const sim_t *s) {
+ measurements[3] = [&](const heisenberg_t *s) {
fwrite(&(s->last_cluster_size), sizeof(uint32_t), 1, outfile_S);
};
diff --git a/src/wolff_planar.cpp b/src/wolff_planar.cpp
index bfb382f..4b9b5f0 100644
--- a/src/wolff_planar.cpp
+++ b/src/wolff_planar.cpp
@@ -4,7 +4,27 @@
#include <wolff.h>
#include <correlation.h>
-typedef state_t <orthogonal_t <2, double>, vector_t <2, double>> sim_t;
+typedef state_t <orthogonal_t <2, double>, vector_t <2, double>> planar_t;
+
+// angle from the x-axis of a two-vector
+double theta(vector_t <2, double> v) {
+ double x = v.x[0];
+ double y = v.x[1];
+
+ double val = atan(y / x);
+
+ if (x < 0.0 && y > 0.0) {
+ return M_PI + val;
+ } else if ( x < 0.0 && y < 0.0 ) {
+ return - M_PI + val;
+ } else {
+ return val;
+ }
+}
+
+double H_modulated(vector_t <2, double> v, int order, double mag) {
+ return mag * cos(order * theta(v));
+}
int main(int argc, char *argv[]) {
@@ -13,17 +33,20 @@ int main(int argc, char *argv[]) {
D_t D = 2;
L_t L = 128;
double T = 2.26918531421;
- double *H = (double *)calloc(MAX_Q, sizeof(double));
+ double *H_vec = (double *)calloc(MAX_Q, sizeof(double));
bool silent = false;
bool use_pert = false;
+ bool modulated_field = false;
+ int order = 2;
+
int opt;
q_t J_ind = 0;
q_t H_ind = 0;
double epsilon = 1;
- while ((opt = getopt(argc, argv, "N:q:D:L:T:J:H:spe:")) != -1) {
+ while ((opt = getopt(argc, argv, "N:q:D:L:T:J:H:spe:mo:")) != -1) {
switch (opt) {
case 'N': // number of steps
N = (count_t)atof(optarg);
@@ -38,7 +61,7 @@ int main(int argc, char *argv[]) {
T = atof(optarg);
break;
case 'H': // external field. nth call couples to state n
- H[H_ind] = atof(optarg);
+ H_vec[H_ind] = atof(optarg);
H_ind++;
break;
case 's': // don't print anything during simulation. speeds up slightly
@@ -50,6 +73,12 @@ int main(int argc, char *argv[]) {
case 'e':
epsilon = atof(optarg);
break;
+ case 'm':
+ modulated_field = true;
+ break;
+ case 'o':
+ order = atoi(optarg);
+ break;
default:
exit(EXIT_FAILURE);
}
@@ -65,7 +94,7 @@ int main(int argc, char *argv[]) {
const char *pert_type;
- std::function <orthogonal_t <2, double>(gsl_rng *, const sim_t *)> gen_R;
+ std::function <orthogonal_t <2, double>(gsl_rng *, const planar_t *)> gen_R;
if (use_pert) {
gen_R = std::bind(generate_rotation_perturbation <2>, std::placeholders::_1, std::placeholders::_2, epsilon);
@@ -81,7 +110,7 @@ int main(int argc, char *argv[]) {
fprintf(outfile_info, "<| \"ID\" -> %lu, \"MODEL\" -> \"PLANAR\", \"q\" -> 2, \"D\" -> %" PRID ", \"L\" -> %" PRIL ", \"NV\" -> %" PRIv ", \"NE\" -> %" PRIv ", \"T\" -> %.15f, \"H\" -> {", timestamp, D, L, L * L, D * L * L, T);
for (q_t i = 0; i < 2; i++) {
- fprintf(outfile_info, "%.15f", H[i]);
+ fprintf(outfile_info, "%.15f", H_vec[i]);
if (i < 2 - 1) {
fprintf(outfile_info, ", ");
}
@@ -111,26 +140,32 @@ int main(int argc, char *argv[]) {
free(filename_S);
free(filename_X);
- std::function <void(const sim_t *)> *measurements = (std::function <void(const sim_t *)> *)calloc(4, sizeof(std::function <void(const sim_t *)>));
+ std::function <void(const planar_t *)> *measurements = (std::function <void(const planar_t *)> *)calloc(4, sizeof(std::function <void(const planar_t *)>));
- measurements[0] = (std::function <void(const sim_t *)>)[&](const sim_t *s) {
+ measurements[0] = (std::function <void(const planar_t *)>)[&](const planar_t *s) {
float smaller_E = (float)s->E;
fwrite(&smaller_E, sizeof(float), 1, outfile_E);
};
- measurements[1] = [&](const sim_t *s) {
+ measurements[1] = [&](const planar_t *s) {
float smaller_X = (float)correlation_length(s);
fwrite(&smaller_X, sizeof(float), 1, outfile_X);
};
- measurements[2] = [&](const sim_t *s) {
+ measurements[2] = [&](const planar_t *s) {
write_magnetization(s->M, outfile_M);
};
- measurements[3] = [&](const sim_t *s) {
+ measurements[3] = [&](const planar_t *s) {
fwrite(&(s->last_cluster_size), sizeof(uint32_t), 1, outfile_S);
};
+ std::function <double(vector_t <2, double>)> H;
+ if (modulated_field) {
+ H = std::bind(H_modulated, std::placeholders::_1, order, H_vec[0]);
+ } else {
+ H = std::bind(H_vector <2, double>, std::placeholders::_1, H_vec);
+ }
- wolff <orthogonal_t <2, double>, vector_t <2, double>> (N, D, L, T, dot <2, double>, std::bind(H_vector <2, double>, std::placeholders::_1, H), gen_R, 4, measurements, silent);
+ wolff <orthogonal_t <2, double>, vector_t <2, double>> (N, D, L, T, dot <2, double>, H, gen_R, 4, measurements, silent);
free(measurements);
@@ -139,7 +174,7 @@ int main(int argc, char *argv[]) {
fclose(outfile_S);
fclose(outfile_X);
- free(H);
+ free(H_vec);
fftw_cleanup();