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

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 r...

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Bibliographic Details
Published in:Scientific reports 2019-08, Vol.9 (1), p.12323-11, Article 12323
Main Authors: Sarkar, Anupam, Chandrashekar, C. M.
Format: Article
Language:English
Subjects:
639/766/483/2802
639/766/483/481
Humanities and Social Sciences
multidisciplinary
Numbers
Probability distribution
Science
Science (multidisciplinary)
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Summary: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.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-48844-4