Decoherence in electron transport: back-scattering, effect on interference and rectification
arXiv:2406.01383 · doi:10.1088/1402-4896/ad8285
Abstract
Decoherence is an undesirable, but ubiquitous phenomenon in quantum systems. Here, we study the effect of partial decoherence, induced via a Büttiker probe, on two-terminal electronic transport across one-dimensional quantum wires and rings, in both the linear and non-linear regimes. We find that dephasing causes backscattering when introduced locally in a ballistic channel. Further, we find that decoherence results in rectification when inversion is broken in the two-terminal transport set-up by a combination of a local dephasing centre and a static impurity. Interestingly, the rectification strength and even its direction varies strongly with the relative distance between the probe and the scatterer. We further analyze how decoherence affects characteristic quantum effects in electronic transport, such as, Fabry-Pérot oscillations in double-barrier setups, and Aharonov-Bohm interference in one-dimensional rings, and find that the amplitude of oscillations in conductance is reduced by decoherence.
8 pages, 8 captioned figures
References in corpus (22)
- Magnetic-field asymmetry of nonlinear mesoscopic transport
- Three-terminal thermoelectric transport through a molecule placed on an Aharonov-Bohm ring
- Signature of the electron-electron interaction in the magnetic field dependence of nonlinear I-V characteristics in mesoscopic systems
- Tuning decoherence with a voltage probe
- Exact description of quantum stochastic models as quantum resistors
- Generic transport formula for a system driven by Markovian reservoirs
- Renormalized Lindblad Driving: A Numerically-Exact Nonequilibrium Quantum Impurity Solver
- The probe technique far-from-equilibrium: Magnetic field symmetries of nonlinear transport
- Magnetic field induced Fabry-Pérot resonances in helical edge states
- Magnetoasymmetric transport in a mesoscopic interferometer: From the weak to the strong coupling regime
- Comparison between the two models of dephasing in mesoscopic systems
- Enhancement of crossed Andreev reflection in a superconducting ladder connected to normal metal leads
- Density and current statistics in boundary-driven monitored fermionic chains
- Dephasing via stochastic absorption: A case study in Aharonov-Bohm oscillations
- Nonlinear conductance in a ballistic Aharonov-Bohm ring
- Magnetic field symmetries of nonlinear transport with elastic and inelastic scattering
- Transconductance as a probe of nonlocality of Majorana fermions
- Tunable crossed Andreev reflection in a heterostructure consisting of ferromagnets, normal metal and superconductors
- Finite transverse conductance and anisotropic magnetoconductance under an applied in-plane magnetic field in two-dimensional electron gases with strong spin-orbit coupling
- Decoherence Effects Break Reciprocity in Matter Transport
- Monitoring quantum transport: Backaction and measurement correlations
- Josephson diode effect in junctions of superconductors with band asymmetric metals