Comment on Nahimovs et al. `On the probability of finding marked connected components using quantum walks'
Abstract
In this comment paper we present two misconceptions found in paper of Nahimovs et al. \emph{On the probability of finding marked connected components using quantum walks}. First, we show that the Theorem 2 (sufficient and necessary condition for a state to be stationary) is incomplete  it works only if unmarked vertices form a single connected component. Second, we correct derivation of \emph{a} coefficient in the Theorem 3 (lower bound on the probability) and show how to upper bound value of \emph{a}.
 Publication:

arXiv eprints
 Pub Date:
 July 2019
 DOI:
 10.48550/arXiv.1907.12277
 arXiv:
 arXiv:1907.12277
 Bibcode:
 2019arXiv190712277G
 Keywords:

 Quantum Physics
 EPrint:
 Link to the `On the probability of finding marked connected components using quantum walks': link.springer.com/article/10.1134/S1995080218070144 (published) [arXiv:1710.04046]