00001 /* 00002 * Functions for calculating quantifying entanglement. 00003 * 00004 * 00005 * Robert Johansson <robert@riken.jp> 00006 * 00007 * $Id: entanglement_8h-source.html,v 1.1.1.1 2008-09-03 09:36:41 rob Exp $ 00008 */ 00009 00010 #ifndef ENTANGLEMENT_H 00011 #define ENTANGLEMENT_H 00012 00013 #include <gsl/gsl_matrix.h> 00014 00015 #include "quantum_system.h" 00016 #include "density_matrix.h" 00017 00018 double entanglement_concurrence(quantum_system *qs, gsl_matrix_complex *rho); 00019 double entanglement_log_neg(gsl_matrix_complex *rho); 00020 double entanglement_neumann_entropy(gsl_matrix_complex *rho); 00021 00022 00023 #endif 00024