constants.hpp

Go to the documentation of this file.

#ifndef VIENNASHE_PHYSICS_CONSTANTS_HPP
#define VIENNASHE_PHYSICS_CONSTANTS_HPP
 
/* ============================================================================
   Copyright (c) 2011-2022, Institute for Microelectronics,
                            Institute for Analysis and Scientific Computing,
                            TU Wien.
 
                            -----------------
     ViennaSHE - The Vienna Spherical Harmonics Expansion Boltzmann Solver
                            -----------------
 
                    http://viennashe.sourceforge.net/
 
   License:         MIT (X11), see file LICENSE in the base directory
=============================================================================== */
 
//
// ALL UNITS ARE SI !
//
 
 
namespace viennashe
{
  namespace physics
  {
    namespace detail
    {
      template <bool dummy = true>  //template argument in order to control linkage
      struct constants
      {
        static const double c_0;
        static const double mass_electron;
        static const double q;
        static const double kB;
        static const double h;
        static const double hbar;
        static const double eps_0;
        static const double mu_0;
        static const double ni;
      };
 
      template <bool b>
      const double constants<b>::c_0 = 299792458.0; // m / s
      template <bool b>
      const double constants<b>::mass_electron = 9.10938291e-31; // kg
      template <bool b>
      const double constants<b>::q      = 1.602176565e-19;     // As
      template <bool b>
      const double constants<b>::kB     = 1.3806488e-23;    // J/K
      template <bool b>
      const double constants<b>::h      = 6.62606896e-34; // Js
      template <bool b>
      const double constants<b>::hbar   = 6.62606896e-34 / (2.0 * 3.1415926535897932384626433832795); // Js
      template <bool b>
      const double constants<b>::eps_0  =  1.0e7 / ( 4.0 * 3.1415926535897932384626433832795 * 299792458.0 * 299792458.0) ; // = 10^7 / (4*pi*c_0^2) ~ 8.854e-12 As / Vm
      template <bool b>
      const double constants<b>::mu_0  =  ( 4.0 * 3.1415926535897932384626433832795 ) * 1.0e-7 ; // = 10^-7 * (4*pi) ~ 12.56e-7   Vs / Am
      template <bool b>
      const double constants<b>::ni = 1.08e16; // m^-3
    }
 
    typedef detail::constants<>   constants;
 
  } //namespace physics
} //namespace viennashe
#endif