Noisy channel

In this software, only the independent error model is handled. In the model, a error in a wire is independent of those in other wires. Here is a command:

IEOpE (bit labels, $\underset{E_1}{(a~~b)(c~~d)}$, $\underset{E_2}{(e~~f)(g~~h)}$, ...);

This command applies a single-wire noisy channel with operation elements $E_1$, $E_2$, ... to every qubits specified by bit labels. An operation element must be written in the form `` $(a~~b)(c~~d)$'' such as `` $(0~~0.1i)(-0.1i~~0)$''.