345 lines
14 KiB
C
345 lines
14 KiB
C
// c99 -ggdb -O2 -DLATTICESUMS -I .. hexlattice_ewald.c ../translations.c ../bessels.c ../lrhankel_recspace_dirty.c ../gaunt.c -lm -lgsl -lblas
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include <math.h>
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#include <stdio.h>
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#include "kahansum.h"
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#include "vectors.h"
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#include <gsl/gsl_const_mksa.h>
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#include <gsl/gsl_math.h>
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#include "qpms_types.h"
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#include "translations.h"
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#define MAXOMEGACOUNT 1000
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#define MAXKCOUNT 100
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const double s3 = 1.732050807568877293527446341505872366942805253810380628055;
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// IMPORTANT: lattice properties here
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const qpms_y_t lMax = 2;
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const double REFINDEX = 1.52;
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const double LATTICE_H = 576e-9;
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static const double SCUFF_OMEGAUNIT = 3e14;
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static const double hbar = GSL_CONST_MKSA_PLANCKS_CONSTANT_HBAR;
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static const double eV = GSL_CONST_MKSA_ELECTRON_CHARGE;
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static const double c0 = GSL_CONST_MKSA_SPEED_OF_LIGHT;
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static const double CC = 0.1;
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// For sorting the points by distance from origin / radius
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int cart2_cmpr (const void *p1, const void *p2) {
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const cart2_t *p1t = (const cart2_t *)p1;
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const cart2_t *p2t = (const cart2_t *)p2;
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double r21 = cart2norm(*p1t);
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double r22 = cart2norm(*p2t);
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if (r21 < r22) return -1;
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else if (r21 > r22) return 1;
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else return 0;
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}
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typedef struct {
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ptrdiff_t npoints; // number of lattice points.
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ptrdiff_t capacity; // for how much points memory is allocated
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double maxR; // circle radius, points <= R
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cart2_t *points;
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} latticepoints_circle_t;
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void sort_cart2points_by_r(cart2_t *points, size_t nmemb) {
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qsort(points, nmemb, sizeof(cart2_t), cart2_cmpr);
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}
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void latticepoints_circle_free(latticepoints_circle_t *c) {
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free(c->points);
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c->capacity = 0;
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}
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// "horizontal" orientation of the adjacent A, B points
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latticepoints_circle_t generate_hexpoints_hor(double h, double R, cart2_t offset /* if zero, an A is in the origin */) {
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latticepoints_circle_t lat;
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lat.maxR = R;
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lat.npoints = 0;
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int nmax = R / (1.5 * h) + 2; // max no of lattice shifts in each direction (with reserve)
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double unitcellS = s3 * 3 / 2 * h * h; // unit cell area
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double flcapacity = 5 + 2 * (R + 5*h) * (R + 5*h) * M_PI / unitcellS; // should be enough with some random reserve
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lat.capacity = flcapacity;
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lat.points = malloc(lat.capacity *sizeof(cart2_t));
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cart2_t BAoffset = {h, 0};
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cart2_t a1 = {-1.5*h, s3/2 *h};
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cart2_t a2 = {1.5*h, s3/2 *h};
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for (ptrdiff_t i1 = -nmax; i1 <= nmax; ++i1)
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for (ptrdiff_t i2 = -nmax; i2 <= nmax; ++i2) {
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cart2_t Apoint = cart2_add(offset, cart2_add(cart2_scale(i1, a1), cart2_scale(i2, a2)));
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if (lat.npoints >= lat.capacity)
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printf("%zd %zd %g %g %g %g\n", lat.npoints, lat.capacity, flcapacity, R, h, unitcellS); if (cart2norm(Apoint) <= R) {
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assert(lat.npoints < lat.capacity);
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lat.points[lat.npoints] = Apoint;
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lat.npoints++;
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}
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cart2_t Bpoint = cart2_add(Apoint, BAoffset);
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if (cart2norm(Bpoint) <= R) {
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assert(lat.npoints < lat.capacity);
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lat.points[lat.npoints] = Bpoint;
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lat.npoints++;
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}
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}
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sort_cart2points_by_r(lat.points, lat.npoints);
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return lat;
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}
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latticepoints_circle_t generate_tripoints_ver(double a, double R, cart2_t offset /* if zero, an A is in the origin */) {
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double h = a / s3;
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latticepoints_circle_t lat;
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lat.maxR = R;
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lat.npoints = 0;
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int nmax = R / (1.5 * h) + 2; // max no of lattice shifts in each direction (with reserve)
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double unitcellS = (s3 * 3) / 2 * h * h; // unit cell area
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double flcapacity = 5 + (R + 3*a) * (R + 3*a) * M_PI / unitcellS; // should be enough with some random reserve
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lat.capacity = flcapacity; // should be enough with some random reserve
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lat.points = malloc(lat.capacity *sizeof(cart2_t));
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cart2_t a1 = {-1.5*h, s3/2 *h};
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cart2_t a2 = {1.5*h, s3/2 *h};
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for (ptrdiff_t i1 = -nmax; i1 <= nmax; ++i1)
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for (ptrdiff_t i2 = -nmax; i2 <= nmax; ++i2) {
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cart2_t Apoint = cart2_add(offset, cart2_add(cart2_scale(i1, a1), cart2_scale(i2, a2)));
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if (cart2norm(Apoint) <= R) {
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if (lat.npoints >= lat.capacity)
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printf("%zd %zd %g %g %g %g\n", lat.npoints, lat.capacity, flcapacity, R, a, unitcellS);
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assert(lat.npoints < lat.capacity);
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lat.points[lat.npoints] = Apoint;
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lat.npoints++;
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}
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}
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sort_cart2points_by_r(lat.points, lat.npoints);
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return lat;
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}
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latticepoints_circle_t generate_tripoints_hor(double a, double R, cart2_t offset /* if zero, an A is in the origin */) {
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double h = a / s3;
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latticepoints_circle_t lat;
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lat.maxR = R;
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lat.npoints = 0;
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int nmax = R / (1.5 * h) + 2; // max no of lattice shifts in each direction (with reserve)
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double unitcellS = s3 * 3 / 2 * h * h; // unit cell area
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double flcapacity = 5 + (R + 3*a) * (R + 3*a) * M_PI / unitcellS; // should be enough with some random reserve
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lat.capacity = flcapacity; // should be enough with some random reserve
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lat.points = malloc(lat.capacity *sizeof(cart2_t));
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cart2_t a1 = {s3/2 *h, -1.5*h};
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cart2_t a2 = {s3/2 *h, 1.5 * h};
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for (int i1 = -nmax; i1 <= nmax; ++i1)
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for (int i2 = -nmax; i2 <= nmax; ++i2) {
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if (lat.npoints >= lat.capacity)
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printf("%zd %zd %.12g %g %g %g\n", lat.npoints, lat.capacity, flcapacity, R, a, unitcellS);
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cart2_t Apoint = cart2_add(offset, cart2_add(cart2_scale(i1, a1), cart2_scale(i2, a2)));
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if (cart2norm(Apoint) <= R) {
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assert(lat.npoints < lat.capacity);
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lat.points[lat.npoints] = Apoint;
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lat.npoints++;
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}
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}
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sort_cart2points_by_r(lat.points, lat.npoints);
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return lat;
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}
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int main (int argc, char **argv) {
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const double LATTICE_A = s3*LATTICE_H;
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const double INVLATTICE_A = 4 * M_PI / s3 / LATTICE_A;
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const double MAXR_REAL = 100 * LATTICE_H;
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const double MAXR_K = 100 * INVLATTICE_A;
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char *omegafile = argv[1];
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// char *kfile = argv[2]; // not used
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char *outfile = argv[3];
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char *outlongfile = argv[4];
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char *outshortfile = argv[5];
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double scuffomegas[MAXOMEGACOUNT];
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cart2_t klist[MAXKCOUNT];
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FILE *f = fopen(omegafile, "r");
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int omegacount = 0;
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while (fscanf(f, "%lf", scuffomegas + omegacount) == 1){
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assert(omegacount < MAXOMEGACOUNT);
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++omegacount;
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}
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fclose(f);
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/*f = fopen(kfile, "r");
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int kcount = 100;
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while (fscanf(f, "%lf %lf", &(klist[kcount].x), &(klist[kcount].y)) == 2) {
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assert(kcount < MAXKCOUNT);
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++kcount;
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}
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fclose(f);
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*/
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int kcount = MAXKCOUNT;
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for (int i = 0; i < kcount; ++i) {
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klist[i].x = 0;
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klist[i].y = 2. * 4. * M_PI / 3. / LATTICE_A / kcount * i;
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}
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const double refindex = REFINDEX;
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const double h = LATTICE_H;
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const double a = h * s3;
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const double rec_a = 4*M_PI/s3/a;
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// generation of the real-space lattices
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const cart2_t cart2_0 = {0, 0};
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const cart2_t ABoffset = {h, 0};
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const cart2_t BAoffset = {-h, 0};
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//const cart2_t ab_particle_offsets[2][2] = {{ {0, 0}, {h, 0} }, {-h, 0}, {0, 0}};
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// THIS IS THE LATTICE OF r_b
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latticepoints_circle_t lattice_0offset = generate_tripoints_ver(a, MAXR_REAL, cart2_0);
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// these have to have the same point order, therefore we must make the offset verision manually to avoid sorting;
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latticepoints_circle_t lattice_ABoffset, lattice_BAoffset;
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lattice_ABoffset.points = malloc(lattice_0offset.npoints * sizeof(cart2_t));
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lattice_ABoffset.capacity = lattice_0offset.npoints * sizeof(cart2_t);
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lattice_ABoffset.npoints = lattice_ABoffset.capacity;
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lattice_BAoffset.points = malloc(lattice_0offset.npoints * sizeof(cart2_t));
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lattice_BAoffset.capacity = lattice_0offset.npoints * sizeof(cart2_t);
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lattice_BAoffset.npoints = lattice_BAoffset.capacity;
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for (int i = 0; i < lattice_0offset.npoints; ++i) {
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lattice_ABoffset.points[i] = cart2_add(lattice_0offset.points[i], ABoffset);
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lattice_BAoffset.points[i] = cart2_add(lattice_0offset.points[i], BAoffset);
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}
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// reciprocal lattice, without offset – DON'T I NEED REFINDEX HERE? (I DON'T THINK SO.)
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latticepoints_circle_t reclattice = generate_tripoints_hor(rec_a, MAXR_K, cart2_0);
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qpms_trans_calculator *c = qpms_trans_calculator_init(lMax, QPMS_NORMALISATION_POWER_CS);
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FILE *out = fopen(outfile, "w");
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FILE *outlong = fopen(outlongfile, "w");
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FILE *outshort = fopen(outshortfile, "w");
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// as in eq. (5) in my notes
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double WL_prefactor = 4*M_PI/(a*a)/s3 / /*??*/ (4*M_PI*M_PI);
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for (int omegai = 0; omegai < omegacount; ++omegai) {
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double scuffomega = scuffomegas[omegai];
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double omega = scuffomega * SCUFF_OMEGAUNIT;
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double EeV = omega * hbar / eV;
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double k0_vac = omega / c0;
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double k0_eff = k0_vac * refindex; // this one will be used with the real x geometries
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double cv = CC * k0_eff;
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complex double Abuf[c->nelem][c->nelem], Bbuf[c->nelem][c->nelem];
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// indices : destpart (A/B-particle), srcpart (A/B-particle), coeff type (A/B- type), desty, srcy
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complex double WS[2][2][2][c->nelem][c->nelem];
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complex double WS_comp[2][2][2][c->nelem][c->nelem];
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complex double WL[2][2][2][c->nelem][c->nelem];
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complex double WL_comp[2][2][2][c->nelem][c->nelem];
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for (int ki = 0; ki < kcount; ++ki) {
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cart2_t k = klist[ki];
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memset(WS, 0, sizeof(WS));
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memset(WS_comp, 0, sizeof(WS_comp));
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memset(WL, 0, sizeof(WL));
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memset(WL_comp, 0, sizeof(WL_comp));
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for (int bi = 0; bi < lattice_0offset.npoints; ++bi) {
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cart2_t point0 = lattice_0offset.points[bi];
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double phase = cart2_dot(k,point0);
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complex double phasefac = cexp(I*phase);
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if (point0.x || point0.y) { // skip the singular point
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qpms_trans_calculator_get_shortrange_AB_arrays(c, (complex double *) Abuf, (complex double *) Bbuf, c->nelem, 1,
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cart22sph(cart2_scale(k0_eff,lattice_0offset.points[bi])), 3, 2, 5, CC);
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for (int desty = 0; desty < c->nelem; ++desty)
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for (int srcy = 0; srcy < c->nelem; ++srcy) {
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ckahanadd(&(WS[0][0][0][desty][srcy]),&(WS_comp[0][0][0][desty][srcy]),Abuf[desty][srcy] * phasefac);
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ckahanadd(&(WS[0][0][1][desty][srcy]),&(WS_comp[0][0][1][desty][srcy]),Bbuf[desty][srcy] * phasefac);
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}
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}
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qpms_trans_calculator_get_shortrange_AB_arrays(c, (complex double *) Abuf, (complex double *) Bbuf, c->nelem, 1,
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cart22sph(cart2_scale(k0_eff,lattice_ABoffset.points[bi])), 3, 2, 5, CC);
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for (int desty = 0; desty < c->nelem; ++desty)
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for (int srcy = 0; srcy < c->nelem; ++srcy) {
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ckahanadd(&(WS[0][1][0][desty][srcy]),&(WS_comp[0][1][0][desty][srcy]),Abuf[desty][srcy] * phasefac);
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ckahanadd(&(WS[0][1][1][desty][srcy]),&(WS_comp[0][1][1][desty][srcy]),Bbuf[desty][srcy] * phasefac);
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}
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qpms_trans_calculator_get_shortrange_AB_arrays(c, (complex double *) Abuf, (complex double *) Bbuf, c->nelem, 1,
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cart22sph(cart2_scale(k0_eff,lattice_BAoffset.points[bi])), 3, 2, 5, CC);
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for (int desty = 0; desty < c->nelem; ++desty)
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for (int srcy = 0; srcy < c->nelem; ++srcy) {
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ckahanadd(&(WS[1][0][0][desty][srcy]),&(WS_comp[1][0][0][desty][srcy]),Abuf[desty][srcy] * phasefac);
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ckahanadd(&(WS[1][0][1][desty][srcy]),&(WS_comp[1][0][1][desty][srcy]),Bbuf[desty][srcy] * phasefac);
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}
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// WS[1][1] is the same as WS[0][0], so copy in the end rather than double-summing
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}
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for (int desty = 0; desty < c->nelem; ++desty)
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for (int srcy = 0; srcy < c->nelem; ++srcy)
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for (int ctype = 0; ctype < 2; ctype++)
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WS[1][1][ctype][desty][srcy] = WS[0][0][ctype][desty][srcy];
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// WS DONE
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for (int Ki = 0; Ki < reclattice.npoints; ++Ki) {
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cart2_t K = reclattice.points[Ki];
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cart2_t k_K = cart2_substract(k, K);
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double phase_AB =
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#ifdef SWAPSIGN1
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-
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#endif
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cart2_dot(k_K, ABoffset); // And maybe the sign is excactly opposite!!! FIXME TODO CHECK
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complex double phasefacs[2][2];
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phasefacs[0][0] = phasefacs[1][1] = 1;
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phasefacs[1][0] = cexp(I * phase_AB); // sign???
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phasefacs[0][1] = cexp(- I * phase_AB); // sign???
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// FIXME should I skip something (such as the origin?)
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qpms_trans_calculator_get_2DFT_longrange_AB_arrays(c, (complex double *) Abuf, (complex double *) Bbuf, c->nelem, 1,
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cart22sph(k_K), 3, 2, 5, cv, k0_eff);
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for (int dp = 0; dp < 2; dp++)
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for (int sp = 0; sp < 2; sp++)
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for (int dy = 0; dy < c->nelem; dy++)
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for (int sy = 0; sy < c->nelem; sy++) {
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ckahanadd(&(WL[dp][sp][0][dy][sy]), &(WL_comp[dp][sp][0][dy][sy]), phasefacs[dp][sp] * Abuf[dy][sy] * WL_prefactor);
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ckahanadd(&(WL[dp][sp][1][dy][sy]), &(WL_comp[dp][sp][1][dy][sy]), phasefacs[dp][sp] * Bbuf[dy][sy] * WL_prefactor);
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}
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}
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fprintf(outshort, "%.16g\t%.16g\t%16g\t%.16g\t%.16g\t",
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scuffomega, EeV, k0_eff, k.x, k.y);
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fprintf(outlong, "%.16g\t%.16g\t%16g\t%.16g\t%.16g\t",
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scuffomega, EeV, k0_eff, k.x, k.y);
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fprintf(out, "%.16g\t%.16g\t%16g\t%.16g\t%.16g\t",
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scuffomega, EeV, k0_eff, k.x, k.y);
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size_t totalelems = sizeof(WL) / sizeof(complex double);
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for (int i = 0; i < totalelems; ++i) {
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complex double ws = ((complex double *)WS)[i];
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complex double wl = ((complex double *)WL)[i];
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complex double w = ws+wl;
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fprintf(outshort, "%.16g\t%.16g\t", creal(ws), cimag(ws));
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fprintf(outlong, "%.16g\t%.16g\t", creal(wl), cimag(wl));
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fprintf(out, "%.16g\t%.16g\t", creal(w), cimag(w));
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}
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fputc('\n', outshort);
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fputc('\n', outlong);
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fputc('\n', out);
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}
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}
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fclose(out);
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fclose(outlong);
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fclose(outshort);
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}
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#if 0
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int main (int argc, char **argv) {
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cart2_t offset = {0,0};
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latticepoints_circle_t lat = generate_tripoints_ver(1, 200, offset);
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for (int i = 0; i < lat.npoints; ++i)
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printf("%g %g %g\n", lat.points[i].x, lat.points[i].y, cart2norm(lat.points[i]));
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latticepoints_circle_free(&lat);
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}
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#endif
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