A quantum algorithm for string matching

Algorithms that search for a pattern within a larger data-set appear ubiquitously in text and image processing. Here, we present an explicit, circuit-level implementation of a quantum pattern-matching algorithm that matches a search string (pattern) of length M inside a longer text of length N . Our...

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Veröffentlicht in:npj quantum information Jg. 7; H. 1; S. 1 - 5
Hauptverfasser: Niroula, Pradeep, Nam, Yunseong
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group UK 16.02.2021
Nature Publishing Group
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Schlagworte:
639/705/117
639/766/483/481
Algorithms
Classical and Quantum Gravitation
Image processing
Physics
Physics and Astronomy
Quantum Computing
Quantum Field Theories
Quantum Information Technology
Quantum Physics
Relativity Theory
Spintronics
String Theory
ISSN:2056-6387, 2056-6387
Online-Zugang:Volltext
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Zusammenfassung:Algorithms that search for a pattern within a larger data-set appear ubiquitously in text and image processing. Here, we present an explicit, circuit-level implementation of a quantum pattern-matching algorithm that matches a search string (pattern) of length M inside a longer text of length N . Our algorithm has a time complexity of O ̃ ( N ) , while the space complexity remains modest at O ( N  +  M ). We report the quantum gate counts relevant for both pre-fault-tolerant and fault-tolerant regimes.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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USDOE
DESC0019040; SC0020312
ISSN:2056-6387
2056-6387
DOI:10.1038/s41534-021-00369-3