250 citations · 856 across the 22 of their papers we have counts for
22 papers
Signatures of interactions in the Andreev spectrum of nanowire Josephson junctions
F. J. Matute-Cañadas, C. Metzger, Sunghun Park +7
We performed microwave spectroscopy of an InAs nanowire between superconducting contacts implementing a finite-length, multi-channel Josephson weak link. Certain features in the sp…
Circuit-QED with phase-biased Josephson weak links
C. Metzger, Sunghun Park, L. Tosi +6
By coupling a superconducting weak link to a microwave resonator, recent experiments probed the spectrum and achieved the quantum manipulation of Andreev states in various systems.…
From adiabatic to dispersive readout of quantum circuits
Sunghun Park, C. Metzger, L. Tosi +4
Spectral properties of a quantum circuit are efficiently read out by monitoring the resonance frequency shift it induces in a microwave resonator coupled to it. When the two system…
Destructive quantum interference in transport through molecules with electron-electron and electron-vibration interactions
P. Roura-Bas, F. Güller, L. Tosi +1
We study the transport through a molecular junction exhibiting interference effects. We show that these effects can still be observed in the presence of molecular vibrations if Cou…
Spin-orbit splitting of Andreev states revealed by microwave spectroscopy
L. Tosi, C. Metzger, M. F. Goffman +6
We have performed microwave spectroscopy of Andreev states in superconducting weak links tailored in an InAs-Al (core-full shell) epitaxially-grown nanowire. The spectra present di…
Design of a Cooper pair box electrometer for application to solid-state and astroparticle physics
Leandro Tosi, Denis Vion, Hélène le Sueur
We describe the design and principle of operation of a fast and sensitive electrometer operated at millikelvin temperatures, which aims at replacing conventional semiconducting cha…
Replicas of the Kondo peak due to electron-vibration interaction in molecular transport properties
P. Roura-Bas, L. Tosi, A. A. Aligia
The low temperature properties of single level molecular quantum dots including both, electron-electron and electron-vibration interactions, are theoretically investigated. The cal…
Coherent manipulation of Andreev states in superconducting atomic contacts
C. Janvier, L. Tosi, L. Bretheau +9
Coherent control of quantum states has been demonstrated in a variety of superconducting devices. In all these devices, the variables that are manipulated are collective electromag…
Restoring the SU(4) Kondo regime in a double quantum dot system
L. Tosi, P. Roura-Bas, A. A. Aligia
We calculate the spectral density and occupations of a system of two capacitively coupled quantum dots, each one connected to its own pair of conducting leads, in a regime of param…
Superconducting atomic contacts inductively coupled to a microwave resonator
C. Janvier, L. Tosi, Ç. Ö. Girit +3
We describe and characterize a microwave setup to probe the Andreev levels of a superconducting atomic contact. The contact is part of a superconducting loop inductively coupled to…
Orbital Kondo spectroscopy in a double quantum dot system
L. Tosi, P. Roura-Bas, A. A. Aligia
We calculate the nonequilibrium conductance of a system of two capacitively coupled quantum dots, each one connected to its own pair of conducting leads. The system has been used r…
Nonequilibrium transport through magnetic vibrating molecules
P. Roura-Bas, L. Tosi, A. A. Aligia
We calculate the nonequilibrium conductance through a molecule or a quantum dot in which the occupation of the relevant electronic level is coupled with intensity to a phonon m…
Barkhausen-type noise in the resistance of antiferromagnetic Cr thin films
L. Tosi, E. Osquiguil, E. E. Kaul +1
We present an experimental study of the changes generated on the electrical resistance of epitaxial Cr thin films by the transformation of quantized spin density wave domain…
Effects of spin density wave quantization on the electrical transport in epitaxial Cr thin films
E. Osquiguil, E. E. Kaul, L. Tosi +1
We present measurements of the electrical resistivity, , in epitaxial Cr films of different thicknesses grown on MgO (100) substrates, as a function of temperature, . The $ρ(…
Thermopower of an SU(4) Kondo resonance under an SU(2) symmetry-breaking field
P. Roura-Bas, L. Tosi, A. A. Aligia +1
We calculate the thermopower of a quantum dot described by two doublets hybridized with two degenerate bands of two conducting leads, conserving orbital (band) and spin quantum num…
Nonequilibrium conductance through a benzene molecule in the Kondo regime
L. Tosi, P. Roura-Bas, A. A. Aligia
Starting from exact eigenstates for a symmetric ring, we derive a low-energy effective generalized Anderson Hamiltonian which contains two spin doublets with opposite momenta and a…
Superconducting Quantum Point Contacts
L. Bretheau, Ç. Girit, L. Tosi +5
We review our experiments on the electronic transport properties of atomic contacts between metallic electrodes, in particular superconducting ones. Despite ignorance of the exact…
Interplay between quantum interference and Kondo effects in nonequilibrium transport through nanoscopic systems
P. Roura-Bas, L. Tosi, A. A. Aligia +1
We calculate the finite temperature and non-equilibrium electric current through systems described generically at low energy by a singlet and \emph{two} spin doublets for and $…
Anderson model out of equilibrium: conductance and Kondo temperature
Leandro Tosi, Pablo Roura-Bas, Ana María Llois +1
We calculate conductance through a quantum dot weakly coupled to metallic contacts by means of Keldysh out of equilibrium formalism. We model the quantum dot with the SU(2) Anderso…
Transition between SU(4) and SU(2) Kondo effect
Leandro Tosi, Pablo Roura-Bas, Armando A. Aligia
Motivated by experiments in nanoscopic systems, we study a generalized Anderson, which consists of two spin degenerate doublets hybridized to a singlet by promotion of an electron…
Effects of vertex corrections on diagrammatic approximations applied to the study of transport through a quantum dot
Leandro Tosi, Pablo Roura-Bas, Ana Maria Llois +1
In the present work, we calculate the conductance through a single quantum dot weakly coupled to metallic contacts. We use the spin-1/2 Anderson model to describe the quantum dot,…
Spin selective transport through Aharonov-Bohm and Aharonov-Casher triple quantum dot systems
Leandro Tosi, A. A. Aligia
We calculate the conductance through a system of three quantum dots under two different sets of conditions that lead to spin filtering effects under an applied magnetic field. In o…