Regensburg 2019 – scientific programme
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O: Fachverband Oberflächenphysik
O 53: 2D Materials II: Transition Metal Dichalcogenides
O 53.8: Talk
Wednesday, April 3, 2019, 12:15–12:30, H16
Tensor-Networks for calculating biexcitons in single layered materials — Sandra C. Kuhn and •Marten Richter — Technische Universität Berlin, Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Germany
The calculation of biexciton states is a numerical very demanding problem due to the high number of involved carriers (two electron-hole pairs). In addition, the rich structure of the Brioullin Zone in two dimensional single layer TMDCs requests an accurate grid on the full Brioullin zone. We show, that a combination of tensor networks with logical circuits lifts this numerical burden and reduce the biexciton problem from a super computer to a workstation problem. Results for excitons and biexcitons in MoS2 are discussed. Furthermore the method shows potential for future application including quantum dynamics of electron-hole complexes.
[1] S. Kuhn, M. Richter arXiv:1807.09036