spline/spline_me_test.cpp at submodule · nd-nuclear-theory/spline · GitHub

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/****************************************************************
  spline_me_test.cpp

  Mark A. Caprio
  University of Notre Dame

****************************************************************/

#include <cmath>
#include <fstream>
#include <iostream>

#include "spline.h"
#include "spline_me.h"

////////////////////////////////////////////////////////////////
// test code
////////////////////////////////////////////////////////////////

struct RadialMonomialParams { int order; };

double RadialMonomialFunction (double r, void * p)
{
  RadialMonomialParams* params = static_cast<RadialMonomialParams*>(p);
  //auto* radial_monomial_params * params = (struct radial_monomial_params *) p;

  double order = (params->order);

  return std::pow(r, order);
}

void TestMatrixElement()
{

  double me;

  std::cout << "Test" << std::endl;

  // <0s|r^2|0s>=1.5  Suhonen Table 6.2

  // using classic matrix element function for r^n and (ik)^n
  me = spline::RadialMatrixElement(
      0, 0, 1.0, spline::BasisType::kOscillator,
      0, 0, 1.0, spline::BasisType::kOscillator,
      spline::OperatorType::kR, 2
    );
  std::cout << "Using RadialMatrixElement: " << me << std::endl;

  // using matrix element function for generic radial function

  gsl_function f;
  struct RadialMonomialParams params = {2};
  f.function = &RadialMonomialFunction;
  f.params = & params;

  me = spline::RadialMatrixElementOfFunction(
      0, 0, 1.0, spline::BasisType::kOscillator,
      0, 0, 1.0, spline::BasisType::kOscillator,
      spline::OperatorType::kR, &f
    );
  std::cout << "Using RadialMatrixElementOfFunction: " << me << std::endl;


}

////////////////////////////////////////////////////////////////
// main
////////////////////////////////////////////////////////////////

int main(int argc, char **argv)
{

  TestMatrixElement();


  // termination
  return 0;
}