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Thermal and optical conductivity in the Holstein model at half filling and at finite temperature in the Luttinger-liquid and charge-density-wave regime
David Jansen, Fabian Heidrich-Meisner
Electron-phonon interactions play a key role in many branches of solid-state physics. Here, our focus is on the transport properties of one-dimensional systems, and we apply effici…
Finite-temperature optical conductivity with density-matrix renormalization group methods for the Holstein polaron and bipolaron with dispersive phonons
David Jansen, Janez Bonča, Fabian Heidrich-Meisner
A comprehensive picture of polaron and bipolaron physics is essential to understand the optical absorption spectrum in many materials with electron-phonon interactions. In particul…
Charge density wave breakdown in a heterostructure with electron-phonon coupling
David Jansen, Christian Jooss, Fabian Heidrich-Meisner
Understanding the influence of vibrational degrees of freedom on transport through a heterostructure poses considerable theoretical and numerical challenges. In this work, we use t…
Comparative Study of State-of-the-Art Matrix-Product-State Methods for Lattice Models with Large Local Hilbert Spaces
Jan Stolpp, Thomas Köhler, Salvatore R. Manmana +3
Lattice models consisting of high-dimensional local degrees of freedom without global particle-number conservation constitute an important problem class in the field of strongly co…
Scaling properties of a spatial one-particle density-matrix entropy in many-body localized systems
Miroslav Hopjan, Fabian Heidrich-Meisner, Vincenzo Alba
We investigate a spatial subsystem entropy extracted from the one-particle density matrix (OPDM) in one-dimensional disordered interacting fermions that host a many-body localized…
Finite-temperature density-matrix renormalization group method for electron-phonon systems: Thermodynamics and Holstein-polaron spectral functions
David Jansen, Janez Bonča, Fabian Heidrich-Meisner
We investigate the thermodynamics and finite-temperature spectral functions of the Holstein polaron using a density-matrix renormalization group method. Our method combines purific…