Multi-bit quantum random number generation from a single qubit quantum walk

Abstract We present a scheme for multi-bit quantum random number generation using a single qubit discrete-time quantum walk in one-dimensional space. Irrespective of the initial state of the qubit, quantum interference and entanglement of particle with the position space in the walk dynamics certifi...

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Autores principales:	Anupam Sarkar, C. M. Chandrashekar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/79d22ae34a7849f18a1982b0b0e942f7
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spelling	oai:doaj.org-article:79d22ae34a7849f18a1982b0b0e942f72021-12-02T15:09:00ZMulti-bit quantum random number generation from a single qubit quantum walk10.1038/s41598-019-48844-42045-2322https://doaj.org/article/79d22ae34a7849f18a1982b0b0e942f72019-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-48844-4https://doaj.org/toc/2045-2322Abstract We present a scheme for multi-bit quantum random number generation using a single qubit discrete-time quantum walk in one-dimensional space. Irrespective of the initial state of the qubit, quantum interference and entanglement of particle with the position space in the walk dynamics certifies high randomness in the system. Quantum walk in a position space of dimension 2 l + 1 ensures string of (l + 2)-bits of random numbers from a single measurement. Bit commitment with the position space and control over the spread of the probability distribution in position space enable us with options to extract multi-bit random numbers. This highlights the power of one qubit, its practical importance in generating multi-bit string in single measurement and the role it can play in quantum communication and cryptographic protocols. This can be further extended with quantum walks in higher dimensions.Anupam SarkarC. M. ChandrashekarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anupam Sarkar C. M. Chandrashekar Multi-bit quantum random number generation from a single qubit quantum walk
description	Abstract We present a scheme for multi-bit quantum random number generation using a single qubit discrete-time quantum walk in one-dimensional space. Irrespective of the initial state of the qubit, quantum interference and entanglement of particle with the position space in the walk dynamics certifies high randomness in the system. Quantum walk in a position space of dimension 2 l + 1 ensures string of (l + 2)-bits of random numbers from a single measurement. Bit commitment with the position space and control over the spread of the probability distribution in position space enable us with options to extract multi-bit random numbers. This highlights the power of one qubit, its practical importance in generating multi-bit string in single measurement and the role it can play in quantum communication and cryptographic protocols. This can be further extended with quantum walks in higher dimensions.
format	article
author	Anupam Sarkar C. M. Chandrashekar
author_facet	Anupam Sarkar C. M. Chandrashekar
author_sort	Anupam Sarkar
title	Multi-bit quantum random number generation from a single qubit quantum walk
title_short	Multi-bit quantum random number generation from a single qubit quantum walk
title_full	Multi-bit quantum random number generation from a single qubit quantum walk
title_fullStr	Multi-bit quantum random number generation from a single qubit quantum walk
title_full_unstemmed	Multi-bit quantum random number generation from a single qubit quantum walk
title_sort	multi-bit quantum random number generation from a single qubit quantum walk
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/79d22ae34a7849f18a1982b0b0e942f7
work_keys_str_mv	AT anupamsarkar multibitquantumrandomnumbergenerationfromasinglequbitquantumwalk AT cmchandrashekar multibitquantumrandomnumbergenerationfromasinglequbitquantumwalk
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Multi-bit quantum random number generation from a single qubit quantum walk

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