arXiv subjects

M. A. Pires

Publications and source records attributed to M. A. Pires.

2 recordsLinked to original sources

arXiv2023

Parrondo's effect in continuous-time quantum walks

We present the first manifestation of a Parrondo's effect in a continuous-time quantum walk (CTQW). In our protocol we consider a CTQW in the presence of time-dependent transition defect. Our results show that the alternation between defects, that individually are detrimental to the wavepacket spreading, can paradoxically enhance overall wavepacket propagation. Our findings pave the way for the exploration of unconventional mechanisms that can potentially harness the adverse effects of defects to enhance quantum transport.

quant-ph↗

arXiv2020

Hysteresis and disorder-induced order in continuous kinetic-like opinion dynamics in complex networks

In this work we tackle a kinetic-like model of opinions dynamics in a networked population endued with a quenched plurality and polarization. Additionally, we consider pairwise interactions that are restrictive, which is modeled with a smooth bounded confidence. Our results show the interesting emergence of nonequilibrium hysteresis and heterogeneity-assisted ordering. Such counterintuitive phenomena are robust to different types of network architectures such as random, small-world and scale-free.

physics.soc-ph↗