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Phys. Rev. A 72, 050306(R) (2005) [4 pages]

Implementation of Grover’s quantum search algorithm in a scalable system

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K.-A. Brickman, P. C. Haljan, P. J. Lee, M. Acton, L. Deslauriers, and C. Monroe
FOCUS Center and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

Received 9 October 2005; published 30 November 2005

We report the implementation of Grover’s quantum search algorithm in the scalable system of trapped atomic ion quantum bits. Any one of four possible states of a two-qubit memory is marked, and following a single query of the search space, the marked element is successfully recovered with an average probability of 60(2)%. This exceeds the performance of any possible classical search algorithm, which can only succeed with a maximum average probability of 50%.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.050306
DOI:
10.1103/PhysRevA.72.050306
PACS:
03.67.Lx, 03.67.Mn, 32.80.Lg, 32.80.Pj