GeminalCoefficientsInterface.hpp

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// This file is part of GQCG-GQCP.
//
// Copyright (C) 2017-2020  the GQCG developers
//
// GQCG-GQCP is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GQCG-GQCP is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GQCG-GQCP.  If not, see <http://www.gnu.org/licenses/>.
 
#pragma once
 
 
#include "ONVBasis/SeniorityZeroONVBasis.hpp"
#include "QCModel/CI/LinearExpansion.hpp"
 
 
namespace GQCP {
 
 
class GeminalCoefficientsInterface {
public:
    // DESTRUCTOR
    virtual ~GeminalCoefficientsInterface() = default;
 
 
    // PUBLIC PURE VIRTUAL METHODS
 
    virtual double overlap(const SpinUnresolvedONV& onv) const = 0;
 
 
    // PUBLIC METHODS
 
    LinearExpansion<double, SeniorityZeroONVBasis> toLinearExpansion(const SeniorityZeroONVBasis& onv_basis) const;
};
 
 
}  // namespace GQCP