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20202026
most citedSums of squares of eigenvalues and the vector chromatic number

3 citations · 4 across the 12 of their papers we have counts for

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2 papers · 1 filter

quant-ph2022

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…

math.CO2022

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.