3 papers
cond-mat.str-el2026
Interaction-driven dynamics in graphene flakes as a benchmark for quantum simulation
Fabian Eickhoff, Satoshi Ejima, Lukas Windgätter +4
We study interaction-driven ultrafast dynamics in finite graphene flakes following an optical pump quench in an interacting tight-binding model. By comparing exact real-time evolut…
cond-mat.str-el2026
Correlation-driven branch in doped excitonic insulators
Tatsuya Kaneko, Ryota Ueda, Satoshi Ejima
We investigate the spectral properties of doped one-dimensional excitonic insulators. Employing matrix-product-state-based methods, we compute the single-particle spectrum and opti…
cond-mat.quant-gas2025
Dynamical correlation functions for the one-dimensional Bose-Hubbard insulator
Kevin zu Münster, Florian Gebhard, Satoshi Ejima +1
We calculate the dynamical current and kinetic-energy correlation functions for the first Mott lobe of the one-dimensional Bose-Hubbard model. We employ the strong-coupling expansi…