partition_ground.h

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#pragma once
 
#include "gridfire/partition/partition_abstract.h"
 
#include "fourdst/logging/logging.h"
 
#include <unordered_map>
#include <memory>
 
#include "quill/Logger.h"
 
namespace gridfire::partition {
     class GroundStatePartitionFunction final : public PartitionFunction {
     public:
         GroundStatePartitionFunction();
         double evaluate(
             const int z,
             const int a,
             const double T9
         ) const override;
         double evaluateDerivative(
             const int z,
             const int a,
             const double T9
         ) const override;
         bool supports(
             const int z,
             const int a
         ) const override;
         std::string type() const override { return "GroundState"; }
         std::unique_ptr<PartitionFunction> clone() const override {
             return std::make_unique<GroundStatePartitionFunction>(*this);
         }
     private:
         quill::Logger* m_logger = fourdst::logging::LogManager::getInstance().getLogger("log");
         std::unordered_map<int, double> m_ground_state_spin;
         static constexpr int make_key(
             const int z,
         const int a);
     };
 
 }