mestate.m

该算法是用于量子运算的matlab程序

% mestate   Maximally entangled state
%    mestate(d) gives the state vector of a maximally 
%    entangled state of two qudits of dimension d.

% Copyright (C) 2005  Geza Toth    E.mail: [e-mail]
%
% This program 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; see gpl.txt
% of this subroutine package.
%
% This program 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 this program; if not, write to the Free Software
% Foundation, Inc., 51 Franklin Street, Fifth Floor, 
% Boston, MA  02110-1301, USA.

function s=mestate(d)

s=zeros(d*d,1);
for n=0:d-1
    s(n+d*n+1)=1;
end %for
s=s/sqrt(s'*s);