Group Order is in QCMA

Fuente: arXiv
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Main Authors: Gall, François Le, Nishimura, Harumichi, Thakkar, Dhara
Format: Preprint
Published: 2025
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author Gall, François Le
Nishimura, Harumichi
Thakkar, Dhara
author_facet Gall, François Le
Nishimura, Harumichi
Thakkar, Dhara
contents In this work, we show that verifying the order of a finite group given as a black-box is in the complexity class QCMA. This solves an open problem asked by Watrous in 2000 in his seminal paper on quantum proofs and directly implies that the Group Non-Membership problem is also in the class QCMA, which further proves a conjecture proposed by Aaronson and Kuperberg in 2006. Our techniques also give improved quantum upper bounds on the complexity of many other group-theoretical problems, such as group isomorphism in black-box groups.
format Preprint
id arxiv_https___arxiv_org_abs_2504_05547
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Group Order is in QCMA
Gall, François Le
Nishimura, Harumichi
Thakkar, Dhara
Quantum Physics
Computational Complexity
Group Theory
In this work, we show that verifying the order of a finite group given as a black-box is in the complexity class QCMA. This solves an open problem asked by Watrous in 2000 in his seminal paper on quantum proofs and directly implies that the Group Non-Membership problem is also in the class QCMA, which further proves a conjecture proposed by Aaronson and Kuperberg in 2006. Our techniques also give improved quantum upper bounds on the complexity of many other group-theoretical problems, such as group isomorphism in black-box groups.
title Group Order is in QCMA
topic Quantum Physics
Computational Complexity
Group Theory
url https://arxiv.org/abs/2504.05547