Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Tuovinen, Riku"'
Autor:
Tuovinen, Riku
Publikováno v:
New J. Phys. 23, 083024 (2021)
One-dimensional nanowires with strong spin-orbit coupling and proximity-induced superconductivity are predicted to exhibit topological superconductivity with condensed-matter analogues to Majorana fermions. Here, the nonequilibrium Green's function a
Externí odkaz:
http://arxiv.org/abs/2105.06193
Publikováno v:
Phys. Rev. B 103, 115439 (2021)
Using the recently developed time-dependent Landauer-B\"uttiker formalism and Jefimenko's retarded solutions to the Maxwell equations, we show how to compute the time-dependent electromagnetic field produced by the charge and current densities in nan
Externí odkaz:
http://arxiv.org/abs/2102.01183
Publikováno v:
J. Chem. Phys. 154, 094104 (2021)
The generalized Kadanoff-Baym ansatz (GKBA) offers a computationally inexpensive approach to simulate out-of-equilibrium quantum systems within the framework of nonequilibrium Green's functions. For finite systems the limitation of neglecting initial
Externí odkaz:
http://arxiv.org/abs/2012.08247
Publikováno v:
Phys. Rev. B 102, 115157 (2020)
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 baths. The transient dynamics of the excitonic order parameter is resolv
Externí odkaz:
http://arxiv.org/abs/2007.07801
Publikováno v:
Entropy 21, 737 (2019)
Using the partition-free time-dependent Landauer-B{\"u}ttiker formalism for transient current correlations, we study the traversal times taken for electrons to cross graphene nanoribbon (GNR) molecular junctions. We demonstrate electron traversal sig
Externí odkaz:
http://arxiv.org/abs/1906.12129
Publikováno v:
J. Chem. Phys. 151, 174110 (2019)
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 speed-up in computational scaling when used together with the Generali
Externí odkaz:
http://arxiv.org/abs/1905.01180
We investigate time-resolved charge transport through graphene nanoribbons supplemented with adsorbed impurity atoms. Depending on the location of the impurities with respect to the hexagonal carbon lattice, the transport properties of the system may
Externí odkaz:
http://arxiv.org/abs/1903.12538
Autor:
Tuovinen, Riku, Perfetto, Enrico, van Leeuwen, Robert, Stefanucci, Gianluca, Sentef, Michael A.
Publikováno v:
New J. Phys. 21, 103038 (2019)
We study time-resolved charge transport in a superconducting nanowire using time-dependent Landauer-B{\"u}ttiker theory. We find that the steady-state Majorana zero-bias conductance peak emerges transiently accompanied by characteristic oscillations
Externí odkaz:
http://arxiv.org/abs/1902.05821
Akademický článek
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Autor:
Tuovinen, Riku, Golež, Denis, Schüler, Michael, Werner, Philipp, Eckstein, Martin, Sentef, Michael A.
A fast time propagation method for nonequilibrium Green's functions based on the generalized Kadanoff--Baym Ansatz (GKBA) is applied to a lattice system with a symmetry-broken equilibrium phase, namely an excitonic insulator. The adiabatic preparatio
Externí odkaz:
http://arxiv.org/abs/1808.00712