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/* density.h: Declarations for density.c
Copyright 2004, 2005 Bjoern Butscher, Hendrik Weimer
This file is part of libquantum
libquantum 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.
libquantum 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 libquantum; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA
*/
#ifndef __DENSITY_H
#define __DENSITY_H
#include "qureg.h"
#define quantum_density_operation(function, rho, ...) \
do{ \
int quantum_int; \
for(quantum_int=0; quantum_int < rho.num; quantum_int++) \
function(__VA_ARGS__, &rho.reg[quantum_int]); \
} while(0)
struct quantum_density_op_struct
{
int num; /* total number of state vectors */
float *prob; /* probabilities of the state vectors */
quantum_reg *reg; /* state vectors */
};
typedef struct quantum_density_op_struct quantum_density_op;
extern quantum_density_op quantum_new_density_op(int num, float *prob,
quantum_reg *reg);
extern quantum_density_op quantum_qureg2density_op(quantum_reg *reg);
extern void quantum_reduced_density_op(int pos, quantum_density_op *rho);
extern quantum_matrix quantum_density_matrix(quantum_density_op *rho);
extern void quantum_print_density_matrix(quantum_density_op *rho);
extern void quantum_delete_density_op(quantum_density_op *rho);
extern float quantum_purity(quantum_density_op *rho);
#endif
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