Mariano J. Salvay

Quantum pump effect in one-dimensional systems of Dirac fermions

We investigate the behavior of the directed current in one-dimensional systems of Dirac fermions driven by local periodic potentials in the forward as well in backscattering channels. We treat the problem with Keldysh non-equilibrium Greens function formalism. We present the exact solution for the case of an infinite wire and show that in this case the dc current vanishes identically. We also investigate a confined system consistent in an annular arrangement coupled to a particle reservoir. We present a perturbative treatment that allows for the analytical expressions of the dc current in the lowest order of the amplitudes of the potential. We also present results obtained from the exact numerical solution of the problem.

Voltage profile and four-terminal resistance of an interacting quantum wire

We investigate the behavior of the four-terminal resistance

Transient effects in the backscattered current of a Luttinger liquid

{R}_{4\text{pt}}

Pumping current and conductance of a Luttinger liquid in the presence of two time-dependent impurities at finite temperatures

in a quantum wire described by a Luttinger liquid in two relevant situations: (i) in the presence of a single impurity within the wire and (ii) under the effect of asymmetries introduced by disordered voltage probes. In the first case, interactions leave a signature in a power-law behavior of

Transient and finite-size effects in transport properties of a quantum wire

{R}_{4\text{pt}}

Effect of nonadiabatic switching of dynamic perturbations in one-dimensional Fermi systems

as a function of the voltage

RG study of a non-local sine-Gordon model

V

Backscattering off a dynamical impurity in one-dimensional Fermi systems : A perturbative computation

and the temperature

Nonperturbative approach to backscattering off a dynamical impurity in one-dimensional Fermi systems

T

Conformal properties of one-dimensional quantum systems with long-range interactions

. In the second case interactions tend to mask the effect of the asymmetries. In both scenarios the occurrence of negative values of