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arXiv · 2306.16369

Complete Equational Theories for the Sum-Over-Paths with Unbalanced Amplitudes

Matthew Amy
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Abstract

Vilmart recently gave a complete equational theory for the balanced sum-over-paths over Toffoli-Hadamard circuits, and by extension Clifford+Rz(2pi/2^k) circuits. Their theory is based on the phase-free ZH-calculus which crucially omits the average rule of the full ZH-calculus, dis-allowing the local summation of amplitudes. Here we study the question of completeness in unbalanced path sums which naturally support local summation. We give a concrete syntax for the unbalanced sum-over-paths and show that, together with symbolic multilinear algebra and the interference rule, various formulations of the average and ortho rules of the ZH-calculus are sufficient to give complete equational theories over arbitrary rings and fields.

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Matthew Amy. 2023-06-28. Complete Equational Theories for the Sum-Over-Paths with Unbalanced Amplitudes. https://doi.org/10.4204/eptcs.384.8

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