Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 70: Correlated Electrons: Method Development III
TT 70.3: Vortrag
Donnerstag, 12. März 2026, 10:00–10:15, HSZ/0101
CFET-Enhanced TDVP Simulations of Floquet Dynamics in the Driven t-V Model — •Tobias Blum1, Karun Gadge2, Salvatore Manmana2, and Reinhard Noack1 — 1Philipps-Universität Marburg, 35032 Marburg, Germany — 2Georg-August-University Göttingen, 37077 Göttingen, Germany
Periodically driven interacting systems feature characteristic Floquet sidebands and frequency-dependent heating, but time evolution remains challenging for explicitly time-dependent Hamiltonians. We study the one-dimensional t-V model using the time-dependent variational principle (TDVP) combined with commutator-free exponential time propagators (CFET). We describe the integration of CFET into an already existing implementation of TDVP within the MPS framework. Its integration allows significantly reduced time-evolution errors. We compare standard TDVP and TDVP enhanced with CFET and analyze heating rates and the structure of Floquet sidebands for different driving frequencies, going from high-frequency regimes to low-frequency behavior. The results show that CFET-enhanced TDVP substantially improves the accuracy of calculated observables in explicitly time-dependent strongly correlated systems.
Keywords: Floquet theory; DMRG; TDVP; CFET