Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 9: Poster Session - Atomic Physics I

A 9.23: Poster

Montag, 9. März 2020, 16:00–18:00, Empore Lichthof

The laser-driven Kitaev chain — •Alexander Luther and Dieter Bauer — Institute of Physics, University of Rostock, 18051 Rostock, Germany

During the recent years, research on high-harmonic generation (HHG) in solid state systems experienced an increasing interest. Most of the often used tight-binding models to describe the interaction of laser fields with solid-state systems conserve the number of electrons. The Kitaev chain, a model for a one-dimensional p-wave superconductor, contains a pairing term that does not conserve the number of electrons and thus is usually treated in Bogolyubov-de-Gennes (BdG) representation. In our work, we study the role of electrons and holes on finite Kitaev chains in the HHG process using a time-dependent tight-binding approach in which the BdG Hamiltonian contains the coupling to the external driver in length gauge. Further, we investigate the laser-driven dynamics of the Majorana edge states, which appear at the ends of of the chain in the topological non-trivial phase of a Kitaev chain.