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A Note on the Quantum Query Complexity of Permutation Symmetric Functions
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10th Innovations in Theoretical Computer Science Conference (ITCS 2019)
Series: Leibniz International Proceedings in Informatics (LIPIcs)
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- Publication Date: 2019-01-08
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André Chailloux. A Note on the Quantum Query Complexity of Permutation Symmetric Functions. In 10th Innovations in Theoretical Computer Science Conference (ITCS 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 124, pp. 19:1-19:7, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)
https://doi.org/10.4230/LIPIcs.ITCS.2019.19
Abstract
It is known since the work of [Aaronson and Ambainis, 2014] that for any permutation symmetric function f, the quantum query complexity is at most polynomially smaller than the classical randomized query complexity, more precisely that R(f) = O~(Q^7(f)). In this paper, we improve this result and show that R(f) = O(Q^3(f)) for a more general class of symmetric functions. Our proof is constructive and relies largely on the quantum hardness of distinguishing a random permutation from a random function with small range from Zhandry [Zhandry, 2015].
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ACM Subject Classification
- Theory of computation → Quantum query complexity
Keywords
- quantum query complexity
- permutation symmetric functions
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References
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