https://doi.org/10.1140/epjs/s11734-025-01768-9
Regular Article
Nonequilibrium transport through the Hubbard dimer
1
Institute of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, 50-370, Wroclaw, Poland
2
Department of Physics, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland
a
yaroslav.pavlyukh@pwr.edu.pl
Received:
31
March
2025
Accepted:
24
June
2025
Published online:
15
July
2025
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 formalism. By employing the iterative generalized Kadanoff-Baym ansatz (iGKBA) within a time-linear framework, we avoid the computational cost of solving the full two-time Kadanoff-Baym equations. Spectral information is extracted by coupling the system to multiple narrow-band leads, establishing a direct analogy to photoemission experiments. Our results reveal correlation-induced shifts and broadening of spectral features, along with a suppression of transient current oscillations. This approach provides a promising avenue for analyzing correlated electron dynamics in open quantum systems.
© The Author(s) 2025
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