Optical Conductivity of One-Dimensional Mott Insulators

Topological Bose-Mott insulators in a one-dimensional optical superlattice.

We study topological properties of the Bose-Hubbard model with repulsive interactions in a one-dimensional optical superlattice. We find that the Mott insulator states of the single-component (two-component) Bose-Hubbard model under fractional fillings are topological insulators characterized by a nonzero charge (or spin) Chern number with nontrivial edge states. For ultracold atomic experiment...

Dynamical Properties of one dimensional Mott Insulators

At low energies the charge sector of one dimensional Mott insulators can be described in terms of a quantum Sine-Gordon model (SGM). Using exact results derived from integrability it is possible to determine dynamical properties like the frequency dependent optical conductivity. We compare the exact results to perturbation theory and renormalisation group calculations. We also discuss the appli...

Exciton recombination in one-dimensional organic Mott insulators

Zala Lenarčič,1,2 Martin Eckstein,3 and Peter Prelovšek2,4 1Institute for Theoretical Physics, University of Cologne, D-50937 Cologne, Germany 2J. Stefan Institute, SI-1000 Ljubljana, Slovenia 3Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, D-22761 Hamburg, Germany 4Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia (Rec...

Effect of Electron-Phonon Interaction on Optical Properties in One-Dimensional Mott Insulators

Interplay of strong electron correlation and electron-phonon interaction is one of important issues in the physics of low dimensional correlated electron systems. In order to understand the interplay, we examine the optical properties of the one-dimensional (1D) Hubbard-Holstein model at half-filling, by employing the dynamical density matrix renormalization group (DMRG) technique. We discuss t...

Title Topological Bose-Mott Insulators in a One-Dimensional Optical Superlattice