Added observable phip2.

[phys/heatbath.git] / obs_phip2_hist.hpp

diff --git a/obs_phip2_hist.hpp b/obs_phip2_hist.hpp
new file mode 100644 (file)
index 0000000..64b82e8
--- /dev/null
+++ b/obs_phip2_hist.hpp
@@ -0,0 +1,71 @@
+#ifndef OBS_PHIP2_HIST_HPP
+#define OBS_PHIP2_HIST_HPP
+
+#include "latlib/o815/o815.h"
+
+#include "latlib/writeout.h"
+
+#include "latlib/obstat.hpp"
+
+#include <iostream>
+
+using namespace std;
+
+class obs_phip2_hist : public o815::obs {
+
+public:
+  struct obsmem {
+    double *phip2;
+  };
+  obs_phip2_hist(o815 *_O815);
+  
+private:
+  void _start() {}
+  void _meas(bool loadedobs, const int& nthmeas);
+  void _finish() {}
+  obsmem OM;
+  sim *Sim;
+};
+
+obs_phip2_hist::obs_phip2_hist(o815 *_O815) : o815::obs("phip2", 
+                                                       _O815->paraQ->getParaNames() + "nthstep:kpt:kpx:phip2", _O815, 
+                                                       sizeof(double)*(_O815->comargs.lsize[0]+1)*(_O815->comargs.lsize[1]+1), 
+                                                       "_hist") {
+  OM.phip2 = (double*)obsMem;
+  Sim = (sim*)O815->Sim;
+}
+
+void obs_phip2_hist::_meas(bool loadedobs, const int& nthmeas) {
+  if (!loadedobs) {
+    for (int kpt = 0; kpt <= O815->comargs.lsize[0]; kpt++)
+      for (int kpx = 0; kpx <= O815->comargs.lsize[1]; kpx++) {
+       double ppt = 2.*M_PI/O815->comargs.lsize[0] * kpt;
+       double ppx = 2.*M_PI/O815->comargs.lsize[1] * kpx;
+
+       OM.phip2[ kpt * ( O815->comargs.lsize[1] + 1 ) + kpx ] = 0;
+       
+       for (int ixt = 0; ixt < O815->comargs.lsize[0]; ixt++)
+         for (int ixx = 0; ixx < O815->comargs.lsize[1]; ixx++)
+           for (int ixpt = 0; ixpt < O815->comargs.lsize[0]; ixpt++)
+             for (int ixpx = 0; ixpx < O815->comargs.lsize[1]; ixpx++)
+               OM.phip2[ kpt * ( O815->comargs.lsize[1] + 1 ) + kpx ] += real( conj( Sim->conf[ ixt*O815->comargs.lsize[1] + ixx ].phi )
+                                                                               * Sim->conf[ ixpt*O815->comargs.lsize[1] + ixpx ].phi
+                                                                               * exp ( _i_*(double)ppx*(double)(ixx-ixpx) + _i_*(double)ppt*(double)(ixt-ixpt) ) );
+       
+       OM.phip2[ kpt * ( O815->comargs.lsize[1] + 1 ) + kpx ] /= Sim->LSIZE2;
+      }
+  }
+  
+  for (int kpt = 0; kpt <= O815->comargs.lsize[0]; kpt++)
+    for (int kpx = 0; kpx <= O815->comargs.lsize[1]; kpx++) {
+      double ppt = 2.*M_PI/O815->comargs.lsize[0] * kpt;
+      double ppx = 2.*M_PI/O815->comargs.lsize[1] * kpx;
+
+      *out << O815->paraQ->getParaVals();
+      *out << "\t" << ( Sim->nequi + (nthmeas+1)*Sim->nskip );
+      *out << "\t" << kpt << "\t" << kpx;
+      *out << "\t" << OM.phip2[ kpt * ( O815->comargs.lsize[1] + 1 ) + kpx ] - 1./(ppt*ppt + ppx*ppx + Sim->m*Sim->m) << endl;
+    }
+};
+
+#endif