diffusion.hpp

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#ifndef QNLP_DIFFUSION
#define QNLP_DIFFUSION

#include <cstddef>
#include <cmath>
#include <complex>
#include <vector>

namespace QNLP{
    template <class SimulatorType>
    class Diffusion{
    public:
        
        Diffusion() {};

        ~Diffusion() {};

        void applyOpDiffusion( SimulatorType& sim, const std::vector<std::size_t>& ctrlIndices, const std::size_t target){
            //For n-controlled not
            for(auto& ctrl : ctrlIndices){
                sim.applyGateH(ctrl);
                sim.applyGateX(ctrl);
            }
            sim.applyGateH(target);
            sim.applyGateX(target);
            
            sim.applyGateNCU(sim.getGateZ(), ctrlIndices, target, "Z");

            sim.applyGateX(target);
            sim.applyGateH(target);

            for(auto& ctrl : ctrlIndices){
                sim.applyGateX(ctrl);
                sim.applyGateH(ctrl);
            }
        }
    };
}
#endif