Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 17: Poster Session: Correlated Electrons 1

TT 17.42: Poster

Montag, 1. April 2019, 15:00–18:30, Poster D

Entanglement properties in quantum phases of the asymmetric two-leg Hubbard ladder — •Anas Abdelwahab and Eric Jeckelmann — Leibniz Universität Hannover, Institut für Theoretische Physik, Appelstr. 2, 30167 Hannover

We investigate entanglement properties of an asymmetric two-leg Hubbard ladder that consists of one Hubbard leg and one tight-binding leg[1,2]. We use the density matrix renormalization group method to study the von Neumann entropy, central charge, Schmidt gap and entanglement spectrum for different quantum phases that appear by varying the inter-leg hopping term. We can distinguish the gapless and the correlated band insulating phases[1,2] using the entanglement properties in the ground state. The differences in entanglement properties between the Kondo-Mott and the spin-gaped Mott insulating phases[1,2] are less clear.
A. Abdelwahab, E. Jeckelmann, and M. Hohenadler, Phys. Rev. B 91, 155119 (2015)
[2] A. Abdelwahab and E. Jeckelmann, Eur. Phys. J. B 91, 207 (2018)