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arXiv · quant-ph/9705041

Single quantum querying of a database

B. M. Terhal·J. A. Smolin
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Abstract

We present a class of fast quantum algorithms, based on Bernstein and Vazirani's parity problem, that retrieve the entire contents of a quantum database $Y$ in a single query. The class includes binary search problems and coin-weighing problems. Our methods far exceed the efficiency of classical algorithms which are bounded by the classical information-theoretic bound. We show the connection between classical algorithms based on several compression codes and our quantum-mechanical method.

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B. M. Terhal, J. A. Smolin. 1997-11-14. Single quantum querying of a database. https://doi.org/10.1103/physreva.58.1822

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