199 citations · 307 across the 18 of their papers we have counts for
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A further look into combinatorial orthogonality
Simone Severini, Ferenc Szöllősi
Strongly quadrangular matrices have been introduced in the study of the combinatorial properties of unitary matrices. It is known that if a (0, 1)-matrix supports a unitary then it…
Partial transpose of permutation matrices
Qing-Hu Hou, Toufik Mansour, Simone Severini
The partial transpose of a block matrix M is the matrix obtained by transposing the blocks of M independently. We approach the notion of partial transpose from a combinatorial poin…
Parameters of Integral Circulant Graphs and Periodic Quantum Dynamics
Nitin Saxena, Simone Severini, Igor Shparlinski
The intention of the paper is to move a step towards a classification of network topologies that exhibit periodic quantum dynamics. We show that the evolution of a quantum system,…
Wick's theorem for q-deformed boson operators
Toufik Mansour, Matthias Schork, Simone Severini
In this paper combinatorial aspects of normal ordering arbitrary words in the creation and annihilation operators of the q-deformed boson are discussed. In particular, it is shown…