-#ifndef SIM_HPP
-#define SIM_HPP
-
-#include <gsl/gsl_rng.h>
-#include <complex>
-#include <math.h>
-
-#include "latlib/neigh.h"
-
-#define EPSILONPHI 0.5
-
-class sim : public o815::sim {
-public:
- struct siteconf {
- complex<double> phi;
- };
- sim(o815 *_O815);
- siteconf* conf;
- unsigned int LSIZE2;
-
-private:
- void _makeSweep();
- void _newParas();
-
- gsl_rng* rangsl;
-
- neigh *nb;
-
- int updatePhi (const int& x);
-
- double M;
-
- double SofPhi(const int& x, const complex<double>& phix);
- double rhoPhi(const int& x, const complex<double>& phixCandidate);
-};
-
-
-
-sim::sim(o815 *_O815) : o815::sim( _O815,
- sizeof(siteconf)*
- (_O815->comargs.lsize[0]*_O815->comargs.lsize[1]) ) {
- conf = (siteconf*)confMem;
-
- rangsl = gsl_rng_alloc(gsl_rng_ranlxs0);
- gsl_rng_set(rangsl, time(NULL));
-
- LSIZE2 = _O815->comargs.lsize[0] * _O815->comargs.lsize[1];
-
- nb = new neigh(2, _O815->comargs.lsize[0], _O815->comargs.lsize[1]);
-}
-
-void sim::_makeSweep() {
- for (int ix = 0; ix < LSIZE2; ix++)
- updatePhi(ix);
-}
-
-void sim::_newParas() {
- M = pow( (*O815->paraQ)["mass"], 2 ) + 4;
- *log << "SIM: Resetting fields." << endl << flush;
- memset(conf, 0, sizeof(siteconf)*LSIZE2);
-}
-
-int sim::updatePhi(const int& x) {
- complex<double> phixCandidate = conf[x].phi +
- complex<double> ( 2*EPSILONPHI*( 0.5 - gsl_rng_uniform(rangsl) ),
- 2*EPSILONPHI*( 0.5 - gsl_rng_uniform(rangsl) ) );
-
- if ( gsl_rng_uniform(rangsl) < rhoPhi(x, phixCandidate) ) {
- conf[x].phi = phixCandidate;
- return 1;
- }
-
- return 0;
-}
-
-double sim::rhoPhi(const int& x, const complex<double>& phixCandidate) {
- return exp( SofPhi(x, conf[x].phi) - SofPhi(x, phixCandidate) );
-}
-
-double sim::SofPhi(const int& x, const complex<double>& phix) {
- double sofphi = M * norm(phix);
-
- for (int nu=0; nu<4; nu++)
- sofphi -= 2 * real( conj(phix) * conf[ (*nb)[x*4+nu] ].phi );
-
- return sofphi;
-}
-
-#endif