SAMOP 2023 – scientific programme
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A: Fachverband Atomphysik
A 20: Poster II
A 20.11: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Towards topological x-ray quantum control — •Jonathan Sturm1, Petar Andrejić2, and Adriana Pálffy1 — 1Julius-Maximilians Universität Würzburg — 2Friedrich-Alexander Universität Erlangen-Nürnberg
Thin film cavities with embedded Mössbauer nuclei such as 57Fe have proven themselves as powerful platforms for resonant x-ray control. Arriving at grazing incidence, incoming x-rays form a standing wave inside the cavity that interacts with the resonant layer, allowing for well-controlled nucleus-field coupling. Alternatively, forward incidence enables excitation of multiple field modes, rendering the nanostructure a multi-mode waveguide. Both principles can be well described using a recently developed Green’s function formalism for the cavity field [1,2].
We investigate theoretically a multi-mode waveguide with several embedded Mössbauer domains implementing tight-binding models known from molecular and solid-state physics. In particular, we arrange the individual Mössbauer domains such that weak and strong inter-domain couplings alternate, facilitating an x-ray photonic implementation of the topological Su-Schrieffer-Heeger model in order to study the behaviour of the waveguide field in presence of a topological boundary mode.
[1] X. Kong et al., Phys. Rev. A 102, 033710 (2020).
[2] P. Andrejić and A. Pálffy, Phys. Rev. A 104, 033702 (2021).