Title

Hitting Time Of Quantum Walks With Perturbation

Keywords

Delayed perturbed hitting time; Delayed perturbed quantum hitting time; Hitting time; Markov chain; Matrix perturbation; Quantum walk; Random walk

Abstract

The hitting time is the required minimum time for a Markov chain-based walk (classical or quantum) to reach a target state in the state space. We investigate the effect of the perturbation on the hitting time of a quantum walk. We obtain an upper bound for the perturbed quantum walk hitting time by applying Szegedy's work and the perturbation bounds with Weyl's perturbation theorem on classical matrix. Based on the definition of quantum hitting time given in MNRS algorithm, we further compute the delayed perturbed hitting time and delayed perturbed quantum hitting time (DPQHT). We show that the upper bound for DPQHT is bounded from above by the difference between the square root of the upper bound for a perturbed random walk and the square root of the lower bound for a random walk. © 2012 Springer Science+Business Media, LLC.

Publication Date

1-1-2013

Publication Title

Quantum Information Processing

Volume

12

Issue

1

Number of Pages

217-228

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s11128-012-0368-9

Socpus ID

84871813851 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84871813851

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