MatsubaraSusceptibility.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_MATSUBARA_SUSCEPTIBILITY
#define COM_DAFER45_TBTK_SOLVER_MATSUBARA_SUSCEPTIBILITY

#include "TBTK/Property/GreensFunction.h"
#include "TBTK/RPA/MomentumSpaceContext.h"
#include "TBTK/Solver/Susceptibility.h"

#include <complex>

namespace TBTK{
namespace Solver{

class MatsubaraSusceptibility : public Susceptibility{
public:
    MatsubaraSusceptibility(
        const MomentumSpaceContext &momentumSpaceContext,
        const Property::GreensFunction &greensFunction
    );

//  virtual ~MatsubaraSusceptibility();

    virtual MatsubaraSusceptibility* createSlave();

    virtual std::vector<std::complex<double>> calculateSusceptibility(
        const Index &index,
        const std::vector<std::complex<double>> &energies
    );

    std::vector<std::complex<double>> calculateSusceptibility(
        const Index &index
    );
private:
    const Property::GreensFunction &greensFunction;

/*  MatsubaraSusceptibility(
        const MomentumSpaceContext &momentumSpaceContext,
        int *kPlusQLookupTable,
        double *fermiDiracLookupTable
    );*/

/*  template<bool useKPlusQLookupTable>
    std::vector<std::complex<double>> calculateSusceptibilityMatsubara(
        const Index &index,
        const std::vector<std::complex<double>> &energies
    );*/
};

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

#endif