[Resource Topic] 2022/466: Quantum binary quadratic form reduction

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Title:
Quantum binary quadratic form reduction

Authors: Nicolas David, Thomas Espitau, Akinori Hosoyamada

Abstract:

Quadratic form reduction enjoys broad uses both in classical and quantum algorithms such as in the celebrated LLL algorithm for lattice reduction. In this paper, we propose the first quantum circuit for definite binary quadratic form reduction that achieves O(n log n) depth, O(n^2) width and O(n^2 log(n)) quantum gates. The proposed work is based on a binary variant of the reduction algorithm of the definite quadratic form. As side results, we show a quantum circuit performing bit rotation with O(log n) depth, O(n) width, and O(n log n) gates, in addition to a circuit performing integer logarithm computation with O(log n) depth, O(n) width, and O(n) gates.

ePrint: https://eprint.iacr.org/2022/466

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