Single spin measurement using cellular automata techniques.
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.
Pérez-Delgado
Carlos A
CA
Institute for Quantum Computing, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
Mosca
Michele
M
Cappellaro
Paola
P
Cory
David G
DG