GSAPSO-MQC: medical image encryption based on genetic simulated annealing particle swarm optimization and modified quantum chaos system

S Yin, H Li - Evolutionary Intelligence, 2021 - Springer
Due to the large amount of image information data, high redundancy and high pixel
correlation, the traditional medical image encryption algorithm is easy to be attacked by …

Open chaotic Dirac billiards: Weak (anti) localization, conductance fluctuations, and decoherence

MSM Barros, AJN Júnior, AF Macedo-Junior, J Ramos… - Physical Review B, 2013 - APS
In this paper, we investigate the transport properties of open chaotic Dirac billiards and their
intrinsic (chiral universal) symmetry classes. The prominent examples of these systems are …

Spin Hall angle fluctuations in a device with disorder

FAF Santana, JM Da Silva, TC Vasconcelos, J Ramos… - Physical Review B, 2020 - APS
We investigate a disorderly mesoscopic device that supports spin-orbit interaction. The
system is connected to four semi-infinite leads embedded in the Landauer-Buttiker setup for …

Effect of proximity-induced spin-orbit coupling in graphene mesoscopic billiards

ALR Barbosa, JGGS Ramos, A Ferreira - Physical Review B, 2021 - APS
van der Waals heterostructures based on two-dimensional materials have recently become
a very active topic of research in spintronics, both aiming at a fundamental description of …

Anticorrelation for conductance fluctuations in chaotic quantum dots

ALR Barbosa, MS Hussein, J Ramos - … E—Statistical, Nonlinear, and Soft Matter …, 2013 - APS
We investigate the correlation functions of mesoscopic electronic transport in open chaotic
quantum dots with finite tunnel barriers in the crossover between Wigner-Dyson ensembles …

Correlation functions and correlation widths in quantum-chaotic scattering for mesoscopic systems and nuclei

J Ramos, ALR Barbosa, BV Carlson, T Frederico… - Physical Review E, 2016 - APS
We derive analytical expressions for the correlation functions of the electronic conductance
fluctuations of an open quantum dot under several conditions. Both the variation of energy …

Generalized correlation functions for conductance fluctuations and the mesoscopic spin Hall effect

J Ramos, ALR Barbosa, D Bazeia, MS Hussein… - Physical Review B …, 2012 - APS
We study the spin Hall conductance fluctuations in ballistic mesoscopic systems. We obtain
universal expressions for the spin and charge current fluctuations, cast in terms of current …

Shot noise on chaotic chiral devices

MSM Barros, I Lucena, A Silva, ALR Barbosa, J Ramos - Physical Review B, 2019 - APS
We investigate both the conductance and the shot-noise power of a confined chiral device
that engenders subtle embedded backscattering mechanisms. We present analytical results …

Spin accumulation encoded in electronic noise for mesoscopic billiards with finite tunneling rates

J Ramos, ALR Barbosa, D Bazeia, MS Hussein - Physical Review B …, 2012 - APS
We study the effects of spin accumulation (inside reservoirs) on electronic transport with
tunneling and reflections at the gates of a quantum dot. Within the stub model, the …

Charge counting statistics and weak localization in a quantum chain

GC Duarte-Filho, FAG Almeida, S Rodríguez-Pérez… - Physical Review B …, 2013 - APS
We study transport properties of a quantum chain formed by an array of chaotic quantum
dots coupled to each other and to electron reservoirs via barriers of arbitrary transparencies …