Dresden 2020 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 46: Many-body Quantum Dynamics I

DY 46.2: Vortrag

Donnerstag, 19. März 2020, 10:00–10:15, HÜL 186

Charge-density-wave melting in the one-dimensional Holstein model — •Jan Stolpp1, Jacek Herbrych2, Florian Dorfner3, Elbio Dagotto4, and Fabian Heidrich-Meisner11Institut für Theoretische Physik, Universität Göttingen — 2Wroclaw University of Science and Technology — 3Arnold Sommerfeld Center for Theoretical Physics, Universität München — 4Department of Physics and Astronomy, University of Tennessee and ORNL

In a recent preprint [1] we study the real-time dynamics in the half-filled Holstein model starting from different initial states that are charge-density-wave (CDW) ordered. The regime where the relaxation dynamics is dominated by electron-phonon coupling is considered (complementary to the case studied in [2] where strong electron interactions were present) and we focus on the far-from-equilibrium regime. Here, a clear separation of time scales between electron relaxation and phonon equilibration is identified. In the transient dynamics we observe effects like a temporal self trapping of the electrons. The study of such regimes is enabled by extending the time-evolving block decimation algorithm with local basis optimization, previously applied to single-polaron dynamics [3], to a half-filled system.

[1] Stolpp et al., arXiv:1911.01718 (2019)

[2] Hashimoto and Ishihara, PRB 96, 035154 (2017)

[3] Brockt et al., PRB 92, 241106(R) (2015)

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