64 citations · 534 across the 32 of their papers we have counts for
34 papers
WannierSTM: Efficient superconducting scanning-probe spectroscopy from maximally localized Wannier functions
Oscar Moreno Segura, Dorye L. Esteras, Andrei Shumilin +3
We present a Python-based program that combines maximally localized Wannier functions-based first-principles electronic structure with the nonequilibrium Green's function formalism…
Avoided crossings in spin-boson systems: consequences for adiabatic state preparation
Joona Marjamäki, Robert van Leeuwen, Riku Tuovinen
Avoided crossings in the correlated many-body spectrum play a central role in determining the conditions for adiabatic state preparation in interacting quantum systems. We investig…
Generation of heat pulses in mesoscopic conductors using light fields
Pedro Portugal, Riku Tuovinen, Christian Flindt
We propose to generate heat pulses in mesoscopic conductors using light fields. In contrast to single-electron excitations such as levitons, which are created by accurate voltage d…
Atomically Reconfigurable Single-Molecule Optoelectronics
Atif Ghafoor, Santeri Neuvonen, Thinh Tran +6
Deterministic control of excitonic properties is key to advancing nanoscale optoelectronic and quantum technologies and to understanding diverse physical, optical, chemical, and bi…
Stability bounds for the generalized Kadanoff-Baym ansatz in the Holstein dimer
O. Moreno Segura, Y. Pavlyukh, R. Tuovinen
Predicting real-time dynamics in correlated systems is demanding: exact two-time Green's function methods are accurate but often too costly, while the Generalized Kadanoff-Baym Ans…
Current cross-correlation spectroscopy of Majorana bound states
Michael Ridley, Eliahu Cohen, Christian Flindt +1
The clock speed of topological quantum computers based on Majorana zero mode (MZM)-supporting nanoscale devices is limited by the time taken for electrons to traverse the device. W…
Nonequilibrium transport through the Hubbard dimer
Yaroslav Pavlyukh, Riku Tuovinen
We apply a computationally efficient approach to study the time- and energy-resolved spectral properties of a two-site Hubbard model using the nonequilibrium Green's function forma…
Thermoelectric energy conversion in molecular junctions out of equilibrium
R. Tuovinen, Y. Pavlyukh
Understanding time-resolved quantum transport is crucial for developing next-generation quantum technologies, particularly in nano- and molecular junctions subjected to time-depend…
Open system dynamics in linear-time beyond the wide-band limit
Yaroslav Pavlyukh, Riku Tuovinen
Nonequilibrium heat transport in quantum systems coupled to wide-band embeddings provides a striking example of the limitations of the generalized Kadanoff-Baym ansatz (GKBA), whil…
Photon-assisted stochastic resonance in nanojunctions
Michael Ridley, Leo Bellassai, Michael Moskalets +2
We study stochastic resonance in molecular junctions driven by a periodically-varying external field. This is done using the time-dependent Landauer-B{ü}ttiker formalism, which fol…
Electroluminescence rectification and high harmonic generation in molecular junctions
R. Tuovinen, Y. Pavlyukh
The field of molecular electronics has emerged from efforts to understand electron propagation through single molecules and to use them in electronic circuits. Serving as a testbed…
Interacting electrons in a flat-band system within the Generalized Kadanoff-Baym Ansatz
F. Cosco, R. Tuovinen, N. Lo Gullo
This work reports the study of the spectral properties of an open interacting system by solving the Generalized Kadanoff-Baym Ansatz (GKBA) master equation for the single-particle…
Cheers: a linear-scaling KBE+GKBA code
Y. Pavlyukh, R. Tuovinen, E. Perfetto +1
The interaction of electrons with quantized phonons and photons underlies the ultrafast dynamics of systems ranging from molecules to solids, giving rise to a plethora of physical…
Time-linear quantum transport simulations with correlated nonequilibrium Green's functions
R. Tuovinen, Y. Pavlyukh, E. Perfetto +1
We present a time-linear scaling method to simulate open and correlated quantum systems out of equilibrium. The method inherits from many-body perturbation theory the possibility t…
A many-body approach to transport in quantum systems: From the transient regime to the stationary state
M. Ridley, N. W. Talarico, D. Karlsson +2
We review one of the most versatile theoretical approaches to the study of time-dependent correlated quantum transport in nano-systems: the non-equilibrium Green's function (NEGF)…
Electron correlation effects in superconducting nanowires in and out of equilibrium
Riku Tuovinen
One-dimensional nanowires with strong spin-orbit coupling and proximity-induced superconductivity are predicted to exhibit topological superconductivity with condensed-matter analo…
Quantum interference and the time-dependent radiation of nanojunctions
Michael Ridley, Lev Kantorovich, Robert van Leeuwen +1
Using the recently developed time-dependent Landauer-Büttiker formalism and Jefimenko's retarded solutions to the Maxwell equations, we show how to compute the time-dependent elect…
Electronic transport in molecular junctions: The generalized Kadanoff-Baym ansatz with initial contact and correlations
Riku Tuovinen, Robert van Leeuwen, Enrico Perfetto +1
The generalized Kadanoff-Baym ansatz (GKBA) offers a computationally inexpensive approach to simulate out-of-equilibrium quantum systems within the framework of nonequilibrium Gree…
Spectral properties of correlated quantum wires and carbon nanotubes within the Generalized Kadanoff-Baym Ansatz
F. Cosco, N. W. Talarico, R. Tuovinen +1
We investigate the spectral properties of an open interacting system by solving the Generalized Kadanoff-Baym Ansatz (GKBA) master equation for the single-particle density matrix,…
Comparing the generalized Kadanoff-Baym ansatz with the full Kadanoff-Baym equations for an excitonic insulator out of equilibrium
Riku Tuovinen, Denis Golež, Martin Eckstein +1
We investigate out-of-equilibrium dynamics in an excitonic insulator (EI) with a finite momentum pairing perturbed by a laser-pulse excitation and a sudden coupling to fermionic ba…
Electron traversal times in disordered graphene nanoribbons
Michael Ridley, Michael A. Sentef, Riku Tuovinen
Using the partition-free time-dependent Landauer-B{ü}ttiker formalism for transient current correlations, we study the traversal times taken for electrons to cross graphene nanorib…
Efficient computation of the second-Born self-energy using tensor-contraction operations
Riku Tuovinen, Fabio Covito, Michael A. Sentef
In the nonequilibrium Green's function approach, the approximation of the correlation self-energy at the second-Born level is of particular interest, since it allows for a maximal…
Time-resolved impurity-invisibility in graphene nanoribbons
Riku Tuovinen, Michael A. Sentef, Claudia Gomes da Rocha +1
We investigate time-resolved charge transport through graphene nanoribbons supplemented with adsorbed impurity atoms. Depending on the location of the impurities with respect to th…
Distinguishing Majorana Zero Modes from Impurity States through Time-Resolved Transport
Riku Tuovinen, Enrico Perfetto, Robert van Leeuwen +2
We study time-resolved charge transport in a superconducting nanowire using time-dependent Landauer-B{ü}ttiker theory. We find that the steady-state Majorana zero-bias conductance…