Magic informationally complete POVMs with permutations

R Soc Open Sci. 2017 Sep 6;4(9):170387. doi: 10.1098/rsos.170387. eCollection 2017 Sep.

Abstract

Eigenstates of permutation gates are either stabilizer states (for gates in the Pauli group) or magic states, thus allowing universal quantum computation (Planat, Rukhsan-Ul-Haq 2017 Adv. Math. Phys. 2017, 5287862 (doi:10.1155/2017/5287862)). We show in this paper that a subset of such magic states, when acting on the generalized Pauli group, define (asymmetric) informationally complete POVMs. Such informationally complete POVMs, investigated in dimensions 2-12, exhibit simple finite geometries in their projector products and, for dimensions 4 and 8 and 9, relate to two-qubit, three-qubit and two-qutrit contextuality.

Keywords: finite geometry; informationally complete POVMs; magic states; permutation groups; quantum contextuality.