file backend_types/MultiModeCode.cpp

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Name
Gambit
TODO: see if we can use this one:

Detailed Description

Author:

Date:

  • 2018 Jan
  • 2020 Sep
  • 2020 Mar

Definitions of the Classy_input class used for communicating with the backend classy.

Authors (add name and date if you modify):

Source code 

//   GAMBIT: Global and Modular BSM Inference Tool
//   *********************************************
///  \file
///
///  Definitions of the Classy_input class used for
///  communicating with the backend classy.
///
///  *********************************************
///
///  Authors (add name and date if you modify):
///
///  \author Selim Hotinli
///  \date 2018 Jan
///
///  \author Janina Renk
///          (janina.renk@fysik.su.se)
///  \date 2020 Sep
///
///  \author Sebastian Hoof
///          (hoof@uni-goettingen.de)
///  \date 2020 Mar
///
///  *********************************************

#include "gambit/Backends/backend_types/MultiModeCode.hpp"

namespace Gambit
{

  // Default constructor for multimode inputs
  // N.B. The constructor is set up to support single field inflation models with instant reheating but allow the inclusion
  //      of more complex models. Some default MultiModeCode (MMC) inputs below might have to be adjusted to facilitate this.
  Multimode_inputs::Multimode_inputs()
  {
    num_inflaton = 1; // Assume single field inflation
    instreheat = 1; // Use the instant reheating approximation
    // Using the instant reheating approximation makes N_pivot a derived parameter and the input N_pivot has no effect
    // We fix it to the dummy value below
    N_pivot = 50;
    // Caveat: Changing the default value of 'slowroll_infl_end' requires defining a custom condition for the end of inflation in MMC!
    slowroll_infl_end = 1; // = true, i.e. stop inflation when slow roll parameters = 1
    // Control the output of analytic approximations for comparison. We do not use these.
    use_deltaN_SR = 0; // = false, i.e. MMC will not calculate deltaN observables (assumes slow roll & sum-separable potentials) at the pivot scale
    use_horiz_cross_approx = 0; // = false, i.e. do not ignore the horizon-crossing-approximation for the above
    evaluate_modes = 1; // = true, i.e. evalute modes and do not just rely on background evolution
    get_runningofrunning = 0; // = false, i.e. do not compute the dervative of the spectral index w.r.t. ln(k)
    // Set the initial conditions for the inflation field(s).
    // N.B. For single field inflation, MMC determines the parameters below self-consistenly; choose sensible entries as starting point
    phi_init0 = {10.0};
    dphi_init0 = {1.0};
  }

}

Updated on 2024-07-18 at 13:53:35 +0000