Fig. 4: Final experimental results of the q-rms error profile εα and locally uniform q-rms error \(\overline{\varepsilon }\).
From: Neutron optical test of completeness of quantum root-mean-square errors
Green data points represent quantum root-mean-square (q-rms) error profile \({\varepsilon }_{\alpha }(A,{{{\Pi }}}_{1},\left|\psi (\alpha )\right\rangle )\) (projective) and red data points represent \({\varepsilon }_{\alpha }(A,{{{\Pi }}}_{2},\left|\psi (\alpha )\right\rangle )\) (POVM), for different evolved states \(\left|\psi (\alpha )\right\rangle\) with measurement time tmeas = 100 sec (error-bars represent ±1 st. dev.). Locally uniform q-rms error \(\overline{\varepsilon }(A,{{{\Pi }}}_{1},| \psi )=2\) (projective) and \(\overline{\varepsilon }(A,{{{\Pi }}}_{2},| \psi )=\sqrt{6}\) (POVM) are represented by green and red line, respectively.
