72 citations · 248 across the 29 of their papers we have counts for
5 papers · 1 filter
Quantum Walks in the Normalized Laplacian
Gabriel Coutinho, Pedro Ferreira Baptista
We provide a characterization of perfect state transfer in a quantum walk whose Hamiltonian is given by the normalized Laplacian. We discuss a connection between classical random w…
Irrational quantum walks
Gabriel Coutinho, Pedro Ferreira Baptista, Chris Godsil +2
The adjacency matrix of a graph G is the Hamiltonian for a continuous-time quantum walk on the vertices of G. Although the entries of the adjacency matrix are integers, its eigenva…
A novel reconstruction attack on foreign-trade official statistics, with a Brazilian case study
Danilo Fabrino Favato, Gabriel Coutinho, Mário S. Alvim +1
In this paper we describe, formalize, implement, and experimentally evaluate a novel transaction re-identification attack against official foreign-trade statistics releases in Braz…
Strong cospectrality in trees
Gabriel Coutinho, Emanuel Juliano, Thomás Jung Spier
We prove that no tree contains a set of three vertices which are pairwise strongly cospectral. This answers a question raised by Godsil and Smith in 2017.
Why and how to add direction to a quantum walk
Rodrigo Chaves, Bruno Oliveira Chagas, Gabriel Coutinho
We formalize the treatment of directed (or chiral) quantum walks using Hermitian adjacency matrices, bridging two developing fields of research in quantum information and spectral…