Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 29: Poster II

HL 29.71: Poster

Dienstag, 18. März 2025, 18:00–20:00, P1

Duration of scattering processes on curved quantum wires — •Adrian Henrik Starke, Benjamin Schwager, and Jamal Berakdar — Martin-Luther-Universität Halle-Wittenberg, Institut für Physik

Over the last decade, the duration of quantum processes has become experimentally accessible via measurement of e.g. the Wigner time delay [1]. However, these measurements have so far only been performed in flat space. This study extends the concept of scattering time to curved, one-dimensional quantum wires. Wigner time delay and other parameters are examined for plane waves as well as wave packets constraint to propagate through these structures. The results demonstrate that the geometry-induced potentials significantly affect the scattering time, particularly at low energies, with the classical behavior emerging at higher energies. These findings offer insights into the interplay between curvature and quantum dynamics, paving the way for further analysis of scattering phenomena in complex geometries.

[1] Schulze et al., 'Delay in Photoemission'. In: Science 328 (2010), DOI: 10.1126/science.1189401

Keywords: Wigner Time Delay; Riemannian manifold; quantum scattering; transport theory