title: Single spin measurement using cellular automata techniques.
abstract: We analyze a conceptual approach to single-spin measurement. The method uses techniques from the theory of quantum cellular automata to correlate a large number of ancillary spins to the one to be measured. It has the distinct advantage of being efficient: under ideal conditions, it requires the application of only O((3)square root N)) steps (each requiring a constant number of rf pulses) to create a system of N correlated spins. Numerical simulations suggest that it is also, to a certain extent, robust against pulse errors, and imperfect initial polarization of the ancilla spin system.
authors.affiliation: Institute for Quantum Computing, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Pérez-Delgado
authors.forename: Michele
authors.initials: M
authors.lastname: Mosca
authors.forename: Paola
authors.initials: P
authors.lastname: Cappellaro
authors.forename: David G
authors.initials: DG
authors.lastname: Cory