Formula_21655

\[\mu_{\rho}\left(x_{1}, \ldots, x_{n}\right)=\operatorname{Tr} E_{n}\left(x_{n}\right) U_{n-1} \ldots U_{1} E\left(x_{1}\right) \rho E\left(x_{1}\right) U_{1}^{*} \ldots U_{n-1}^{*} E_{n}\left(x_{n}\right)\]