Greens.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_GREENS
#define COM_DAFER45_TBTK_SOLVER_GREENS

#include "TBTK/Communicator.h"
#include "TBTK/Model.h"
#include "TBTK/Property/GreensFunction.h"
#include "TBTK/Property/SelfEnergy.h"
#include "TBTK/Property/TransmissionRate.h"
#include "TBTK/Solver/Solver.h"

#include <complex>

namespace TBTK{
namespace Solver{

class Greens : public Solver, public Communicator{
public:
    Greens();

    virtual ~Greens();

    void setGreensFunction(const Property::GreensFunction &greensFunction);

    const Property::GreensFunction& getGreensFunction() const;

    Property::GreensFunction calculateInteractingGreensFunction(
        const Property::SelfEnergy &selfEnergy
    ) const;

    Property::TransmissionRate calculateTransmissionRate(
        const Property::SelfEnergy &selfEnergy0,
        const Property::SelfEnergy &selfEnergy1
    ) const;
private:
    const Property::GreensFunction *greensFunction;
};

inline void Greens::setGreensFunction(
    const Property::GreensFunction &greensFunction
){
    this->greensFunction = &greensFunction;
}

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

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

#endif