SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 22: Nonequilibrium Quantum Many-Body Systems I (joint session TT/DY)

TT 22.2: Vortrag

Dienstag, 28. März 2023, 09:45–10:00, HSZ 204

Spectral response of a charge density wave insulator to periodic driving — •Alexander Osterkorn, Constantin Meyer, and Salvatore Manmana — Institut für Theoretische Physik, Georg-August-Universität Göttingen, Germany

Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. Here we address in detail the emergence of a cosine-like band in the gap region of the non-equilibrium single-particle spectral function of strongly interacting spinless fermions on a chain in the charge density wave phase [1]. We compare the dynamics of the periodically driven system to the quench dynamics with an effective Floquet Hamiltonian and discuss the role of doublon excitations in both cases. This is investigated using both matrix product state based time evolution techniques as well as time-dependent Hartree-Fock. [1] arXiv:2205.09557