title: Optimal measurements for resolution beyond the Rayleigh limit.
abstract: We establish the conditions to attain the ultimate resolution predicted by quantum estimation theory for the case of two incoherent point sources using a linear imaging system. The solution is closely related to the spatial symmetries of the detection scheme. In particular, for real symmetric point spread functions, any complete set of projections with definite parity achieves the goal.
authors.forename: J
authors.initials: J
authors.lastname: Rehacek
authors.forename: M
authors.initials: M
authors.lastname: Paúr
authors.forename: B
authors.initials: B
authors.lastname: Stoklasa
authors.forename: Z
authors.initials: Z
authors.lastname: Hradil
authors.forename: L L
authors.initials: LL
authors.lastname: Sánchez-Soto