Papers

G. Coutinho, E. Juliano, T. J. Spier
Strong cospectrality in trees
Submitted.

M. K. de Carli Silva, G. Coutinho, R. Grandsire, T. Oliveira
On a semidefinite relaxation for the maximum k-colourable subgraph problem
[conference] Submitted.

M. S. Alvim, G. Coutinho, D. Favato, N. Fernandes
A novel reconstruction attack on foreign-trade official statistics, with a Brazilian case study
[conference] Accepted to PETS.

R. Chaves, G. Coutinho, B. O. Chagas
Why and how to add direction to a quantum walk
Submitted.

G. Coutinho, C. Godsil, E. Juliano, C. van Bommel
Quantum walks do not like bridges
Submitted.

M. K. de Carli Silva, G. Coutinho, R. Grandsire
An eigenvalue bound for the fractional chromatic number
Submitted.

Chan, Coutinho, Drazen, Eisenberg, Godsil, Lippner, Kempton, Tamon, Zhan
Fundamentals of fractional revival in graphs
Submitted.

A. Abiad, G. Coutinho, M. A. Fiol, B. Nogueira, S. Zeijlemaker
Optimization of eigenvalue bounds for the independence and chromatic number of graph powers
Discrete Mathematics (2022).

N. Benedetto Proença, M. K. de Carli Silva, G. Coutinho
Dual Hoffman Bounds for the Stability and Chromatic Numbers Based on SDP
SIAM Journal of Discrete Math (2021).

A. Chan, G. Coutinho, C. Tamon, L. Vinet, H. Zhan
Fractional Revival and Association Schemes
Discrete Mathematics (2020).

G. Coutinho, L. Vinet, H. Zhan, A. Zhedanov
Perfect State Transfer in a Spin Chain without Mirror Symmetry
Journal of Physics A – Mathematical & Theoretical (2019).

G. Coutinho, R. Grandsire, C. Passos
Colouring the Normalized Laplacian
[conference] LAGOS 2019 – Electronic Notes in Theoretical Computer Science (2019).

M. K. de Carli Silva, G. Coutinho, C. Godsil, D. Roberson
Algebras, graphs and thetas
[conference] LAGOS 2019 – Electronic Notes in Theoretical Computer Science (2019).

A. Chan, G. Coutinho, C. Tamon, L. Vinet, H. Zhan
Quantum fractional revival on graphs
Discrete Applied Mathematics. (2019)

A. Abiad, G. Coutinho, M. A. Fiol
On the k-independence number of graphs
Discrete Mathematics. (2019)

G. Coutinho, C. Godsil, K. Guo, H. Zhan
A new perspective on the average mixing matrix
Electronic Journal of Combinatorics. (2018)

G. Coutinho, C. Godsil
Continuous-Time Quantum Walks in Graphs
IMAGE, The Bulletin of the International Linear Algebra Society. (2018)

G. Coutinho, R. Portugal
Discretization of continuous-time quantum walks via the staggered model with Hamiltonians
Natural Computing.  (2018)

G. Coutinho
Quantum walks and the size of the graph
Discrete Mathematics. (2018)

G. Coutinho, K. Guo, C. van Bommel
Pretty good state transfer between internal nodes of paths
Quantum Information and Computation. (2017)

L. Banchi, G. Coutinho, C. Godsil, S. Severini
Pretty Good State Transfer in Qubit Chains – The Heisenberg Hamiltonian
Journal of Mathematical Physics
. (2017)

G. Coutinho, C. Godsil
Perfect state transfer is poly-time
Quantum Information and Computation
. (2017)

G. Coutinho, C. Godsil, M. Shirazi, H. Zhan.
Equiangular Lines and Covers of the Complete Graph
Linear Algebra and Its Applications
. (2016)

G. Coutinho.
Spectrally extremal vertices, strong cospectrality and state transfer
Electronic Journal of Combinatorics. (2016)

G. Coutinho, C. Godsil.
Perfect state transfer in graph products
Linear and Multilinear Algebra
. (2015)

G. Coutinho, H. Liu.
No Laplacian Perfect State Transfer in Trees
SIAM Discrete Math
. (2015)

G. Coutinho, C. Godsil, K. Guo, F. Vanhove.
Perfect state transfer on distance-regular graphs and association schemes
Linear Algebra and Its Applications.
 (2015)