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DY: Fachverband Dynamik und Statistische Physik

DY 57: Poster: Statistical Physics; Critical Phenomena; Stochastic Thermodynamics; Extreme Events; Data Analytics

DY 57.13: Poster

Donnerstag, 19. März 2020, 15:00–18:00, P1C

Impurity-induced Wavefunction Scarring on curved surfaces — •Michael Kraus, Dominik Schulz, and Jamal Berakdar — Martin-Luther Universität Halle-Wittenberg, Halle (Saale), Germany

Quantum Scarring is a phenomenom where Eigenstates of a quantum chaotic system show enhanced probability along short periodic orbits. Recently, it has been shown that strong scarring occurs by perturbing quantum oscillator systems with localized impurities. [2] Among others, magnetic fields, impurity strength and their positioning can be used to control Scars. [3] Moreover, this effect is accompanied by very efficient wave-packet dynamics which opens the possibility for useful quantum-transport applications. In this work we address the influence of curvature (systems like cylinders and tori) by using the thin-layer approximation and additionally introduce Rashba-type spin-orbit coupling along the surface.

[1] E. Heller, Phys. Rev. Let. 53, (1984); [2] P. Luukko, et al., Sci. Rep. 6, 37656 (2016); [3] J. Keski-Rahkonen, et al., Phys. Rev. B 96, 094204 (2017);