Single Spin Measurement Using Cellular Automata Techniques

作     者：Carlos A. Pérez-Delgado Michele Mosca Paola Cappellaro David G. Cory 

作者机构：Institute for Quantum Computing University of Waterloo Waterloo ON N2L 3G1 Canada Perimeter Institute for Theoretical Physics Waterloo ON N2J 2W9 Canada Department of Nuclear Science and Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2006年第97卷第10期

页      面：100501-100501页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Quantum theory 

摘      要：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(N3) 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.