117 citations · 1.1k across the 71 of their papers we have counts for
5 papers · 1 filter
Mixing Times in Quantum Walks on the Hypercube
F. L. Marquezino, R. Portugal, G. Abal +1
The mixing time of a discrete-time quantum walk on the hypercube is considered. The mean probability distribution of a Markov chain on a hypercube is known to mix to a uniform dist…
Bulk viscosity and deflationary universes
J. A. S. Lima, R. Portugal, I. Waga
We analyze the conditions that make possible the description of entropy generation in the new inflationary model by means of a nearequilibrium process. We show that there are situa…
Simulation of the Single- and Double-Slit Experiments with Quantum Walkers
Amanda C. Oliveira, Renato Portugal, Raul Donangelo
We employ the broken-link model to create a barrier with slits in a two-dimensional lattice. The diffraction and interference patterns of the probability distribution of quantum wa…
Quantum algorithm for the hidden subgroup problem on a class of semidirect product groups
Carlos Magno M. Cosme, Renato Portugal
We present efficient quantum algorithms for the hidden subgroup problem (HSP) on the semidirect product of cyclic groups , where is any odd prime num…
The Invar Tensor Package
Jose M. Martin-Garcia, Renato Portugal, Leon R. U. Manssur
The Invar package is introduced, a fast manipulator of generic scalar polynomial expressions formed from the Riemann tensor of a four-dimensional metric-compatible connection. The…