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 …

Semiclassical treatment of quantum chaotic transport with a tunnel barrier

PHS Bento, M Novaes - Journal of Physics A: Mathematical and …, 2021 - iopscience.iop.org
We consider the problem of a semiclassical description of quantum chaotic transport, when
a tunnel barrier is present in one of the leads. Using a semiclassical approach formulated in …

Quantum transport in chaotic cavities with tunnel barriers

LH Oliveira, PHS Bento, M Novaes - Physical Review B, 2022 - APS
We bring together the semiclassical approximation, matrix integrals, and the theory of
symmetric polynomials in order to solve a long-standing problem in the field of quantum …

Universal Braess paradox in open quantum dots

ALR Barbosa, D Bazeia, J Ramos - Physical Review E, 2014 - APS
We present analytical and numerical results that demonstrate the presence of the Braess
paradox in chaotic quantum dots. The paradox that we identify, originally perceived in …

Spin-to-charge conversion in 2D electron gas and single-layer graphene devices

J Ramos, TC Vasconcelos, ALR Barbosa - Journal of Applied Physics, 2018 - pubs.aip.org
We investigate the spin-to-charge conversion emerging from a mesoscopic device
connected to multiple terminals. We obtain analytical expressions to the characteristic …

Tunable crossovers for the quantum interference correction to conductance and shot-noise power in chaotic quantum dots with nonideal contacts

J Ramos, ALR Barbosa, AMS Macêdo - Physical Review B—Condensed Matter …, 2011 - APS
We study a large class of tunable crossovers between the three Dyson universality classes
for electron transport through chaotic quantum dots with nonideal contacts. We present …

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 …

Electronic transport in three-terminal chaotic systems with a tunnel barrier

LH Oliveira, ALR Barbosa… - Journal of Physics A …, 2022 - iopscience.iop.org
We consider the problem of electronic quantum transport through ballistic mesoscopic
systems with chaotic dynamics, connected to a three-terminal architecture in which one of …

Statistics of quantum transport in weakly nonideal chaotic cavities

S Rodríguez-Pérez, R Marino, M Novaes, P Vivo - Physical Review E …, 2013 - APS
We consider statistics of electronic transport in chaotic cavities where time-reversal
symmetry is broken and one of the leads is weakly nonideal; that is, it contains tunnel …