init.hpp

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#pragma once
 
/**
 * KohnShamQuantumSystem — Kohn-Sham specialization of the quantum system.
 *
 * Adds spin configuration to the generic QuantumSystem base.
 * Crystal structure is inherited from QuantumSystem.
 * Still templated on the state type — concrete representations
 * (planewave, pseudopotential) specialize further.
 */
 
#include "layer_2_quantum_system/quantum_system.hpp"
 
namespace q3 {
 
/**
 * Kohn-Sham quantum system: crystal (inherited) + spin + state storage.
 *
 * Inherits crystal and state vector from QuantumSystem<QuantumStateType>.
 */
template <typename QuantumStateType>
class KohnShamQuantumSystem : public QuantumSystem<QuantumStateType> {
  public:
    ~KohnShamQuantumSystem() override = default;
 
    int number_of_spin_components{1};
};
 
} // namespace q3