init.hpp

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#pragma once
 
/**
 * FermiEnergyCalculator — abstract base for Fermi energy calculation.
 *
 * Calculators are purely algorithmic: they read eigenvalues and occupations
 * from a quantum system snapshot and update the Fermi energy and occupations.
 */
 
#include "layer_0_core/types/init.hpp"
 
namespace q3 {
 
/// Abstract base for Fermi energy calculators.
class FermiEnergyCalculator {
  public:
    virtual ~FermiEnergyCalculator() = default;
 
    /// Compute occupations and return the Fermi energy.
    virtual Real calculate_occupations() = 0;
};
 
} // namespace q3