gusucode.com > qit_matlab_0.10.0工具箱源码程序 > qit/+gate/id.m
function U = id(dim) % ID Identity gate. % I = id(dim) % % Returns the identity gate I for the specified system. % dim is a vector of subsystem dimensions. % Ville Bergholm 2010 U = lmap(speye(prod(dim)), {dim, dim});