SelfEnergy2.h

/* Copyright 2018 Kristofer Björnson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef COM_DAFER45_TBTK_SOLVER_SELF_ENERGY2
#define COM_DAFER45_TBTK_SOLVER_SELF_ENERGY2

#include "TBTK/Property/GreensFunction.h"
#include "TBTK/Property/InteractionVertex.h"
#include "TBTK/Property/SelfEnergy.h"
#include "TBTK/MomentumSpaceContext.h"
#include "TBTK/Solver/Solver.h"

namespace TBTK{
namespace Solver{

class SelfEnergy2 : public Solver, public Communicator{
public:
    SelfEnergy2(
        const MomentumSpaceContext &momentumSpaceContext,
        const Property::InteractionVertex &interactionVertex,
        const Property::GreensFunction &greensFunction
    );

    const MomentumSpaceContext& getMomentumSpaceContext() const;

    const Property::InteractionVertex& getInteractionVertex() const;

    const Property::GreensFunction& getGreensFunction() const;

    std::vector<std::complex<double>> calculateSelfEnergy(
        const Index &index,
        int lowerMatsubaraEnergyIndex,
        int upperMatsubaraEnergyIndex
    );

    Property::SelfEnergy calculateSelfEnergyAllBlocks(
        const Index &index,
        int lowerMatsubaraEnergyIndex,
        int upperMatsubaraEnergyIndex
    );
private:
    const MomentumSpaceContext &momentumSpaceContext;

    const Property::InteractionVertex &interactionVertex;

    const Property::GreensFunction &greensFunction;

    unsigned int getNumIntraBlockIndices();

    std::vector<Index> getIntraBlockIndexList();
};

inline const MomentumSpaceContext& SelfEnergy2::getMomentumSpaceContext(
) const{
    return momentumSpaceContext;
}

inline const Property::InteractionVertex& SelfEnergy2::getInteractionVertex(
) const{
    return interactionVertex;
}

inline const Property::GreensFunction& SelfEnergy2::getGreensFunction(
) const{
    return greensFunction;
}

};  //End of namespace Solver
};  //End of namespace TBTK

#endif