Automated equivalence checking of concurrent quantum systems

Article


Ardeshir-Larijani, E., Gay, S. and Nagarajan, R. 2018. Automated equivalence checking of concurrent quantum systems. ACM Transactions on Computational Logic. 19 (4), pp. 1-32. https://doi.org/10.1145/3231597
TypeArticle
TitleAutomated equivalence checking of concurrent quantum systems
AuthorsArdeshir-Larijani, E., Gay, S. and Nagarajan, R.
Abstract

The novel field of quantum computation and quantum information has gathered significant momentum in the last few years. It has the potential to radically impact the future of information technology and in influence the development of modern society. The construction of practical, general purpose quantum computers has been challenging, but quantum cryptographic and communication devices have been available in the commercial marketplace for several years. Quantum networks have been built in various cities around the world and a dedicated satellite has been launched by China to provide secure quantum communication. Such new technologies demand rigorous analysis and verification before they can be trusted in safety- and security- critical applications. Experience with classical hardware and software systems has shown the difficulty of achieving robust and reliable implementations.
We present CCSq, a concurrent language for describing quantum systems, and develop verification techniques for checking equivalence between CCSq processes. CCSq has well-defined operational and superoperator semantics for protocols that are functional, in the sense of computing a deterministic input-output relation for all interleavings arising from concurrency in the system. We have implemented QEC (Quantum Equivalence Checker), a tool which takes the specification and implementation of quantum protocols, described in CCSq, and automatically checks their equivalence. For efficiency purposes, we restrict ourselves to Clifford operators in the stabilizer formalism, but we are able to verify protocols over all input states. We have specified and verified a collection of interesting and practical quantum protocols ranging from quantum communication and quantum cryptography to quantum error correction.

Research GroupFoundations of Computing group
PublisherAssociation for Computing Machinery (ACM)
JournalACM Transactions on Computational Logic
ISSN1529-3785
Electronic1557-945X
Publication dates
Print20 Nov 2018
Publication process dates
Deposited25 Jun 2018
Accepted05 Jun 2018
Output statusPublished
Accepted author manuscript
Copyright Statement

© 2018 Association for Computing Machinery.
This is the author’s version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in ACM Transactions on Computational Logic (Volume 19, Issue 4), https://doi.org/10.1145/3231597.

Digital Object Identifier (DOI)https://doi.org/10.1145/3231597
LanguageEnglish
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