An information-theoretic analysis of Grover's algorithm
IEEE International Symposium on Information Theory - Proceedings
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Please cite this item using this persistent URLhttp://hdl.handle.net/11693/27521
A quantum algorithm for identifying a target element in an unstructured search universe of N items in approximately π/4√N queries to a quantum oracle was discovered. It was proved that this square-root speed-up was the best attainable performance gain by any quantum algorithm. This paper presents an information-theoretic analysis of Grover's algorithm and gives a tight lower bound on the complexity of search algorithms using Grover's oracle.