inline_genprop_matelem_pt_colorvec_w.cc

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/*! \file
 * \brief Compute the matrix element of  LatticeColorVector*M^-1*Gamma*M^-1**LatticeColorVector
 *
 * Generalized propagator calculation on a colorstd::vector
 */
 
#include "handle.h"
//#include "meas/inline/hadron/inline_genprop_matelem_pt_colorvec_w.h"
#include "inline_genprop_matelem_pt_colorvec_w.h"
#include "meas/inline/abs_inline_measurement_factory.h"
#include "meas/smear/link_smearing_aggregate.h"
#include "meas/smear/link_smearing_factory.h"
#include "meas/smear/displace.h"
#include "meas/glue/mesplq.h"
#include "qdp_map_obj.h"
#include "util/ferm/key_val_db.h"
#include "util/ferm/key_prop_colorvec.h"
#include "util/ft/sftmom.h"
#include "util/info/proginfo.h"
#include "meas/inline/make_xml_file.h"
 
#include "meas/inline/io/named_objmap.h"
#include "io/qprop_io.h"
#include "util/ferm/transf.h"
 
namespace Chroma 
{ 
  /*!
   * \ingroup hadron
   *
   * @{
   */
  namespace InlineGenPropMatElemPtColorVecEnv 
  { 
    // Reader for input parameters
    void read(XMLReader& xml, const std::string& path, Params::Param_t::DispGamma_t& param)
    {
      XMLReader paramtop(xml, path);
    
      read(paramtop, "gamma", param.gamma);
      read(paramtop, "displacement", param.displacement);
    }
 
    // Reader for input parameters
    void read(XMLReader& xml, const std::string& path, Params::Param_t& param)
    {
      XMLReader paramtop(xml, path);
    
      int version;
      read(paramtop, "version", version);
 
      switch (version) 
      {
      case 1:
        param.restrict_plateau = false;
        param.avg_equiv_mom    = false;
        break;
 
      case 2:
        read(paramtop, "restrict_plateau", param.restrict_plateau);
        read(paramtop, "avg_equiv_mom", param.avg_equiv_mom);
        break;
 
      default :
        QDPIO::cerr << "Input parameter version " << version << " unsupported." << std::endl;
        QDP_abort(1);
      }
 
      read(paramtop, "t_sink", param.t_sink);
      read(paramtop, "mom2_max", param.mom2_max);
      read(paramtop, "mom_offset", param.mom_offset);
      read(paramtop, "displacement_length", param.displacement_length);
      read(paramtop, "DisplacementGammaList", param.disp_gamma_list);
      read(paramtop, "num_vecs", param.num_vecs);
      read(paramtop, "mass_label", param.mass_label);
 
      param.link_smearing  = readXMLGroup(paramtop, "LinkSmearing", "LinkSmearingType");
    }
 
 
    // Writer for input parameters
    void write(XMLWriter& xml, const std::string& path, const Params::Param_t::DispGamma_t& param)
    {
      push(xml, path);
 
      write(xml, "gamma", param.gamma);
      write(xml, "displacement", param.displacement);
 
      pop(xml);
    }
 
    // Writer for input parameters
    void write(XMLWriter& xml, const std::string& path, const Params::Param_t& param)
    {
      push(xml, path);
 
      int version = 2;
 
      write(xml, "version", version);
      write(xml, "restrict_plateau", param.restrict_plateau);
      write(xml, "avg_equiv_mom", param.avg_equiv_mom);
      write(xml, "t_sink", param.t_sink);
      write(xml, "mom_offset", param.mom_offset);
      write(xml, "mom2_max", param.mom2_max);
      write(xml, "displacement_length", param.displacement_length);
      write(xml, "DisplacementGammaList", param.disp_gamma_list);
      write(xml, "num_vecs", param.num_vecs);
      write(xml, "mass_label", param.mass_label);
 
      xml << param.link_smearing.xml;
 
      pop(xml);
    }
 
    //! Read named objects 
    void read(XMLReader& xml, const std::string& path, Params::NamedObject_t& input)
    {
      XMLReader inputtop(xml, path);
 
      read(inputtop, "gauge_id", input.gauge_id);
      read(inputtop, "source_prop_id", input.source_prop_id);
      read(inputtop, "sink_prop_id", input.sink_prop_id);
      read(inputtop, "genprop_op_file", input.genprop_op_file);
    }
 
    //! Write named objects
    void write(XMLWriter& xml, const std::string& path, const Params::NamedObject_t& input)
    {
      push(xml, path);
 
      write(xml, "gauge_id", input.gauge_id);
      write(xml, "source_prop_id", input.source_prop_id);
      write(xml, "sink_prop_id", input.sink_prop_id);
      write(xml, "genprop_op_file", input.genprop_op_file);
 
      pop(xml);
    }
 
    // Writer for input parameters
    void write(XMLWriter& xml, const std::string& path, const Params& param)
    {
      param.writeXML(xml, path);
    }
  }
 
 
  namespace InlineGenPropMatElemPtColorVecEnv 
  { 
    // Anonymous namespace for registration
    namespace
    {
      AbsInlineMeasurement* createMeasurement(XMLReader& xml_in, 
                                              const std::string& path) 
      {
        return new InlineMeas(Params(xml_in, path));
      }
 
      //! Local registration flag
      bool registered = false;
    }
 
    const std::string name = "GENPROP_MATELEM_PT_COLORVEC";
 
    //! Register all the factories
    bool registerAll() 
    {
      bool success = true; 
      if (! registered)
      {
        success &= LinkSmearingEnv::registerAll();
        success &= TheInlineMeasurementFactory::Instance().registerObject(name, createMeasurement);
        registered = true;
      }
      return success;
    }
 
 
    //! Anonymous namespace
    /*! Diagnostic stuff */
    namespace
    {
      StandardOutputStream& operator<<(StandardOutputStream& os, const multi1d<int>& d)
      {
        if (d.size() > 0)
        {
          os << d[0];
 
          for(int i=1; i < d.size(); ++i)
            os << " " << d[i];
        }
 
        return os;
      }
    }
 
 
    //----------------------------------------------------------------------------
    // Param stuff
    Params::Params()
    { 
      frequency = 0; 
      param.mom2_max = 0;
    }
 
    Params::Params(XMLReader& xml_in, const std::string& path) 
    {
      try 
      {
        XMLReader paramtop(xml_in, path);
 
        if (paramtop.count("Frequency") == 1)
          read(paramtop, "Frequency", frequency);
        else
          frequency = 1;
 
        // Read program parameters
        read(paramtop, "Param", param);
 
        // Read in the output propagator/source configuration info
        read(paramtop, "NamedObject", named_obj);
 
        // Possible alternate XML file pattern
        if (paramtop.count("xml_file") != 0) 
        {
          read(paramtop, "xml_file", xml_file);
        }
      }
      catch(const std::string& e) 
      {
        QDPIO::cerr << __func__ << ": Caught Exception reading XML: " << e << std::endl;
        QDP_abort(1);
      }
    }
 
 
    void
    Params::writeXML(XMLWriter& xml_out, const std::string& path) const
    {
      push(xml_out, path);
    
      // Parameters for source construction
      write(xml_out, "Param", param);
 
      // Write out the output propagator/source configuration info
      write(xml_out, "NamedObject", named_obj);
 
      pop(xml_out);
    }
 
 
    //----------------------------------------------------------------------------
    //! Generalized propagator operator
    struct KeyGenPropElementalOperator_t
    {
      int                t_slice;       /*!< Propagator time slice */
      int                t_source;      /*!< Source time slice */
      int                t_sink;        /*!< Source time slice */
      int                spin_l;        /*!< Source spin index */
      int                spin_r;        /*!< Sink spin index */
      int                gamma;         /*!< The gamma matrix number - [0,Ns^2) */
      multi1d<int>       displacement;  /*!< Displacement dirs of right colorstd::vector */
      multi1d<int>       mom;           /*!< D-1 momentum of this operator */
      std::string        mass_label;    /*!< A mass label */
    };
 
    //! Generalized propagator operator
    struct ValGenPropElementalOperator_t
    {
      multi2d<ComplexD>  op;              /*!< Colorstd::vector source and sink with momentum projection */
    };
 
 
    //----------------------------------------------------------------------------
    //! Holds key and value as temporaries
    struct KeyValGenPropElementalOperator_t
    {
      SerialDBKey<KeyGenPropElementalOperator_t>  key;
      SerialDBData<ValGenPropElementalOperator_t> val;
    };
 
 
    //----------------------------------------------------------------------------
    //! KeyGenPropElementalOperator reader
    void read(BinaryReader& bin, KeyGenPropElementalOperator_t& param)
    {
      read(bin, param.t_slice);
      read(bin, param.t_source);
      read(bin, param.t_sink);
      read(bin, param.spin_l);
      read(bin, param.spin_r);
      read(bin, param.gamma);
      read(bin, param.displacement);
      read(bin, param.mom);
      read(bin, param.mass_label, 32);
    }
 
    //! GenPropElementalOperator write
    void write(BinaryWriter& bin, const KeyGenPropElementalOperator_t& param)
    {
      write(bin, param.t_slice);
      write(bin, param.t_source);
      write(bin, param.t_sink);
      write(bin, param.spin_l);
      write(bin, param.spin_r);
      write(bin, param.gamma);
      write(bin, param.displacement);
      write(bin, param.mom);
      write(bin, param.mass_label);
    }
 
 
    //----------------------------------------------------------------------------
    //! PropElementalOperator reader
    void read(BinaryReader& bin, ValGenPropElementalOperator_t& param)
    {
      int n;
      read(bin, n);    // the size is always written, even if 0
      param.op.resize(n,n);
  
      for(int i=0; i < n; ++i)
      {
        for(int j=0; j < n; ++j)
        {
          read(bin, param.op(i,j));
        }
      }
    }
 
    //! GenPropElementalOperator write
    void write(BinaryWriter& bin, const ValGenPropElementalOperator_t& param)
    {
      int n = param.op.size1();  // all sizes the same
      write(bin, n);
      for(int i=0; i < n; ++i)
      {
        for(int j=0; j < n; ++j)
        {
          write(bin, param.op(i,j));
        }
      }
    }
 
 
    //----------------------------------------------------------------------------
    //! Normalize just one displacement array
    multi1d<int> normDisp(const multi1d<int>& orig)
    {
      START_CODE();
 
      multi1d<int> disp;
      multi1d<int> empty; 
      multi1d<int> no_disp(1); no_disp[0] = 0;
 
      // NOTE: a no-displacement is recorded as a zero-length array
      // Convert a length one array with no displacement into a no-displacement array
      if (orig.size() == 1)
      {
        if (orig == no_disp)
          disp = empty;
        else
          disp = orig;
      }
      else
      {
        disp = orig;
      }
 
      END_CODE();
 
      return disp;
    } // void normDisp
 
 
    //-------------------------------------------------------------------------------
    // Function call
    void 
    InlineMeas::operator()(unsigned long update_no,
                           XMLWriter& xml_out) 
    {
      // If xml file not empty, then use alternate
      if (params.xml_file != "")
      {
        std::string xml_file = makeXMLFileName(params.xml_file, update_no);
 
        push(xml_out, "GenPropMatElemPtColorVec");
        write(xml_out, "update_no", update_no);
        write(xml_out, "xml_file", xml_file);
        pop(xml_out);
 
        XMLFileWriter xml(xml_file);
        func(update_no, xml);
      }
      else
      {
        func(update_no, xml_out);
      }
    }
 
 
    // Function call
    void 
    InlineMeas::func(unsigned long update_no,
                     XMLWriter& xml_out) 
    {
      START_CODE();
 
      StopWatch snoop;
      snoop.reset();
      snoop.start();
 
      StopWatch swiss;
                        
      push(xml_out, "GenPropMatElemPtColorVec");
      write(xml_out, "update_no", update_no);
 
      QDPIO::cout << name << ": Generalized propagator color-std::vector matrix element" << std::endl;
 
      // Test and grab a reference to the gauge field
      XMLBufferWriter gauge_xml;
      XMLReader source_prop_file_xml, source_prop_record_xml;
      XMLReader sink_prop_file_xml, sink_prop_record_xml;
      try
      {
        TheNamedObjMap::Instance().getData< multi1d<LatticeColorMatrix> >(params.named_obj.gauge_id);
        TheNamedObjMap::Instance().get(params.named_obj.gauge_id).getRecordXML(gauge_xml);
 
        TheNamedObjMap::Instance().getData<LatticePropagator>(params.named_obj.source_prop_id);
        TheNamedObjMap::Instance().getData< Handle<QDP::MapObject<KeyPropColorVec_t,LatticeFermion> > >(params.named_obj.sink_prop_id);
 
        // Snarf the prop info. This is will throw if the prop_id is not there
        TheNamedObjMap::Instance().get(params.named_obj.source_prop_id).getFileXML(source_prop_file_xml);
        TheNamedObjMap::Instance().get(params.named_obj.source_prop_id).getRecordXML(source_prop_record_xml);
 
        // Snarf the prop info. This is will throw if the prop_id is not there
        TheNamedObjMap::Instance().get(params.named_obj.sink_prop_id).getFileXML(sink_prop_file_xml);
        TheNamedObjMap::Instance().get(params.named_obj.sink_prop_id).getRecordXML(sink_prop_record_xml);
      }
      catch( std::bad_cast ) 
      {
        QDPIO::cerr << name << ": caught dynamic cast error" << std::endl;
        QDP_abort(1);
      }
      catch (const std::string& e) 
      {
        QDPIO::cerr << name << ": std::map call failed: " << e << std::endl;
        QDP_abort(1);
      }
      // Cast should be valid now
      const multi1d<LatticeColorMatrix>& u = 
        TheNamedObjMap::Instance().getData< multi1d<LatticeColorMatrix> >(params.named_obj.gauge_id);
 
      const LatticePropagator& source_prop =
        TheNamedObjMap::Instance().getData<LatticePropagator>(params.named_obj.source_prop_id);
      const QDP::MapObject<KeyPropColorVec_t,LatticeFermion>& sink_ferm_map =
        *(TheNamedObjMap::Instance().getData< Handle<QDP::MapObject<KeyPropColorVec_t,LatticeFermion> > >(params.named_obj.sink_prop_id));
 
      push(xml_out, "Output_version");
      write(xml_out, "out_version", 2);
      pop(xml_out);
 
      proginfo(xml_out);    // Print out basic program info
 
      // Write out the input
      params.writeXML(xml_out, "Input");
 
      // Write out the source header
      write(xml_out, "Source_prop_file_info", source_prop_file_xml);
      write(xml_out, "Source_prop_record_info", source_prop_record_xml);
      write(xml_out, "Sink_prop_file_info", sink_prop_file_xml);
      write(xml_out, "Sink_prop_record_info", sink_prop_record_xml);
 
      // Write out the config info
      write(xml_out, "Config_info", gauge_xml);
 
      //First calculate some gauge invariant observables just for info.
      //This is really cheap.
      MesPlq(xml_out, "Observables", u);
 
 
      PropSourceConst_t source_header;
      
      read(source_prop_record_xml, "/Propagator/PropSource", source_header);
      
      
      QDPIO::cout << "Point Propagator successfully found and parsed" << std::endl;
      
      //multi1d<int> source = prop_header.source_header.getTSrce();
      multi1d<int> source = source_header.getTSrce();
      
      int decay_dir = source_header.j_decay ;
      int t_source = source_header.t_source;
      
      //Real Mass =  getMass(source_header.fermact);
      //QDPIO::cout << "Mass = " << Mass << std::endl;
      QDPIO::cout << "source = "
                  << source[0]<<" "
                  << source[1]<<" "
                  << source[2]<<" "
                  << source[3]<< std::endl;
 
 
      //
      // Initialize the slow Fourier transform phases
      //
      SftMom phases(params.param.mom2_max,source, params.param.mom_offset, 
                    params.param.avg_equiv_mom, decay_dir);
 
      //
      // Smear the gauge field if needed
      //
      multi1d<LatticeColorMatrix> u_smr = u;
 
      try
      {
        std::istringstream  xml_l(params.param.link_smearing.xml);
        XMLReader  linktop(xml_l);
        QDPIO::cout << "Link smearing type = " << params.param.link_smearing.id << std::endl;
        
        
        Handle< LinkSmearing >
          linkSmearing(TheLinkSmearingFactory::Instance().createObject(params.param.link_smearing.id,
                                                                       linktop, 
                                                                       params.param.link_smearing.path));
 
        (*linkSmearing)(u_smr);
      }
      catch(const std::string& e) 
      {
        QDPIO::cerr << name << ": Caught Exception link smearing: " << e << std::endl;
        QDP_abort(1);
      }
 
      MesPlq(xml_out, "Smeared_Observables", u_smr);
 
      //
      // DB storage
      //
      BinaryStoreDB< SerialDBKey<KeyGenPropElementalOperator_t>, SerialDBData<ValGenPropElementalOperator_t> > 
        qdp_db;
 
      // Open the file, and write the meta-data and the binary for this operator
      if (! qdp_db.fileExists(params.named_obj.genprop_op_file))
      {
        XMLBufferWriter file_xml;
 
        push(file_xml, "DBMetaData");
        write(file_xml, "id", std::string("genPropElemOp"));
        write(file_xml, "lattSize", QDP::Layout::lattSize());
        write(file_xml, "decay_dir", decay_dir);
        proginfo(file_xml);    // Print out basic program info
        write(file_xml, "Params", params.param);
        write(file_xml, "Op_Info", params.param.disp_gamma_list);
        write(file_xml, "Source_prop_record_info", source_prop_record_xml);
        write(file_xml, "Sink_prop_record_info", sink_prop_record_xml);
        write(file_xml, "Config_info", gauge_xml);
        write(file_xml, "source", source);
        pop(file_xml);
 
        // NOTE: we always write a metadata, even if the file exists. 
        // Probably should not do this if a file already exists.
        // Yukky, but add on a bunch of padding. 
        // This is in case a latter task writes another metadata.
        std::string file_str(file_xml.str());
        qdp_db.setMaxUserInfoLen(file_str.size());
 
        qdp_db.open(params.named_obj.genprop_op_file, O_RDWR | O_CREAT, 0664);
 
        qdp_db.insertUserdata(file_str);
      }
      else
      {
        qdp_db.open(params.named_obj.genprop_op_file, O_RDWR, 0664);
      }
 
 
      //
      // Generalized propagatos
      //
      QDPIO::cout << "Building generalized propagators" << std::endl;
 
      push(xml_out, "ElementalOps");
 
      // Loop over all time slices for the source. This is the same 
      // as the subsets for  phases
 
      const bool restrict_plateau = params.param.restrict_plateau;
      const int num_vecs          = params.param.num_vecs;
      const int t_sink            = params.param.t_sink;
 
      // Define the start and end region for the plateau
      int t_start;
      int t_end;
 
      if (restrict_plateau)
      {
        t_start = t_source;
        t_end   = t_sink;
 
        if (t_source > t_sink)
        {
          t_end += phases.numSubsets();
        }
      }
      else
      {
        t_start = 0;
        t_end   = phases.numSubsets() - 1;
      }
 
      // Loop over each operator 
      for(int l=0; l < params.param.disp_gamma_list.size(); ++l)
      {
        StopWatch watch;
 
        QDPIO::cout << "Elemental operator: op = " << l << std::endl;
 
        // Make sure displacement is something sensible
        multi1d<int> disp = normDisp(params.param.disp_gamma_list[l].displacement);
 
        // Fold in the gamma_5 associated with hermiticity of the sink. 
        // Can multiply the desired Gamma on the left by gamma_5
        int gamma = params.param.disp_gamma_list[l].gamma;
        int gamma_tmp = (Ns*Ns-1) ^ gamma;
 
        QDPIO::cout << "gamma=" << gamma_tmp << "  displacement= " << disp << std::endl;
 
        // Build the operator
        swiss.reset();
        swiss.start();
 
        // Big loop over the momentum projection
        for(int mom_num = 0 ; mom_num < phases.numMom() ; ++mom_num) 
        {
          // Loop over spins
          for(int spin_r=0; spin_r < Ns; ++spin_r)
          {
            QDPIO::cout << "spin_r = " << spin_r << std::endl; 
 
            for(int spin_l=0; spin_l < Ns; ++spin_l)
            {
              QDPIO::cout << "spin_l = " << spin_l << std::endl; 
 
              // The keys for the spin and displacements for this particular elemental operator
              // No displacement for left colorstd::vector, only displace right colorstd::vector
              // Invert the time - make it an independent key
              multi1d<KeyValGenPropElementalOperator_t> buf(phases.numSubsets());
              for(int tt=t_start; tt <= t_end; ++tt)
              {
                int t = tt % phases.numSubsets(); // mod back into a normal interval
 
                buf[t].key.key().t_slice       = t;
                buf[t].key.key().t_source      = t_source;
                buf[t].key.key().t_sink        = t_sink;
                buf[t].key.key().spin_r        = spin_r;
                buf[t].key.key().spin_l        = spin_l;
                buf[t].key.key().mass_label    = params.param.mass_label;
                buf[t].key.key().mom           = phases.numToMom(mom_num);
                buf[t].key.key().gamma         = gamma;
                buf[t].key.key().displacement  = disp; // only right colorstd::vector
 
                buf[t].val.data().op.resize(num_vecs, Nc);
              }
 
              for(int color_r = 0; color_r < Nc; ++color_r)
              {
 
                LatticeFermion q ;
                PropToFerm(source_prop, q, color_r, spin_r);
                
                // Displace the right std::vector and multiply by the momentum phase
                LatticeFermion shift_ferm = Gamma(gamma_tmp) * displace(u_smr, q,
                                                                        params.param.displacement_length,
                                                                        disp);
 
                for(int i = 0; i < params.param.num_vecs; ++i)
                {
                  KeyPropColorVec_t key_l;
                  key_l.t_source     = t_sink;
                  key_l.colorvec_src = i;
                  key_l.spin_src     = spin_l;
                  
                  watch.reset();
                  watch.start();
 
                  // Contract over color indices
                  // Do the relevant quark contraction
                  LatticeFermion tmpvec_sink; sink_ferm_map.get(key_l, tmpvec_sink);
 
                  LatticeComplex lop = localInnerProduct(tmpvec_sink, shift_ferm);
 
                  // Reweight the phase in case there was momentum averaging
                  Real reweight;
                  if (phases.multiplicity(mom_num) > 0)
                    reweight = Real(phases.multiplicity(mom_num));
                  else
                    reweight = 1.0;
 
                  // Slow fourier-transform
                  multi1d<ComplexD> op_sum = sumMulti(reweight * phases[mom_num] * lop, phases.getSet());
 
                  watch.stop();
 
                  for(int tt=t_start; tt <= t_end; ++tt)
                  {
                    int t = tt % phases.numSubsets(); // mod back into a normal interval
                    buf[t].val.data().op(i,color_r) = op_sum[t];
                  }
                } // end for i
              } // end for j
 
              QDPIO::cout << "insert: mom= " << phases.numToMom(mom_num) << " displacement= " << disp << std::endl; 
              for(int tt=t_start; tt <= t_end; ++tt)
              {
                int t = tt % phases.numSubsets(); // mod back into a normal interval
                qdp_db.insert(buf[t].key, buf[t].val);
              }
 
            } // end for spin_l
          } // end for spin_r
        } // mom_num
 
        swiss.stop();
 
        QDPIO::cout << "GenProp operator= " << l 
                    << "  time= "
                    << swiss.getTimeInSeconds() 
                    << " secs" << std::endl;
 
      } // for l
 
      pop(xml_out); // ElementalOps
 
      // Close the namelist output file XMLDAT
      pop(xml_out);     // GenPropMatElemColorVector
 
      snoop.stop();
      QDPIO::cout << name << ": total time = " 
                  << snoop.getTimeInSeconds() 
                  << " secs" << std::endl;
 
      QDPIO::cout << name << ": ran successfully" << std::endl;
 
      END_CODE();
    } // func
  } // namespace InlineGenPropMatElemPtColorVecEnv
 
  /*! @} */  // end of group hadron
 
} // namespace Chroma