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ham.h
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ham.h
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/* Copyright (C) 2012 Ward Poelmans
This file is part of Hubbard-GPU.
Hubbard-GPU is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Hubbard-GPU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Hubbard-GPU. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HAM_H
#define HAM_H
#include <vector>
#include <string>
#include "bare-ham.h"
/**
* This is the main (base) class. It calculates the full Hamiltonian matrix for 1D Hubbard. It can both exact diagonlize
* or use a Lanczos algorithm to calculate the groundstate energy.
* @author Ward Poelmans <[email protected]>
*/
class Hamiltonian: public BareHamiltonian
{
public:
Hamiltonian(int L, int Nu, int Nd, double J, double U);
virtual ~Hamiltonian();
void BuildFullHam();
virtual void mvprod(double *x, double *y, double alpha) const;
protected:
virtual int hopping(myint a, myint b, int jumpsign) const;
};
#endif /* HAM_H */
/* vim: set ts=8 sw=4 tw=0 expandtab :*/