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A Complete Equational Theory for Quantum Circuits

Quantum Physics 2023-11-15 v2

Abstract

We introduce the first complete equational theory for quantum circuits. More precisely, we introduce a set of circuit equations that we prove to be sound and complete: two circuits represent the same unitary map if and only if they can be transformed one into the other using the equations. The proof is based on the properties of multi-controlled gates -- that are defined using elementary gates -- together with an encoding of quantum circuits into linear optical circuits, which have been proved to have a complete axiomatisation.

Keywords

Cite

@article{arxiv.2206.10577,
  title  = {A Complete Equational Theory for Quantum Circuits},
  author = {Alexandre Clément and Nicolas Heurtel and Shane Mansfield and Simon Perdrix and Benoît Valiron},
  journal= {arXiv preprint arXiv:2206.10577},
  year   = {2023}
}

Comments

92 pages

R2 v1 2026-06-24T11:58:54.873Z