Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Information II
Q 44.8: Talk
Thursday, March 14, 2024, 12:45–13:00, HS 1199
Mesoscopic quantum dynamic in X-ray waveguides — •Petar Andrejic1, Leon Lohse2,3, and Adriana Palffy4 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg — 2Deutsches Elektronen-Synchrotron — 3Georg-August-Universität Göttingen — 4Julius-Maximilians-Universität Würzburg
Grazing incidence X-ray waveguides have become a well established platform for X-ray quantum optics. In these systems, X-rays are scattered resonantly by Mössbauer transitions in atomic nuclei, leading to a collective interaction between the indistinguishable nuclei and the waveguide field.
We show that driving such X-ray waveguides at forward incidence allows for direct excitation of multiple guided modes, with centimetre scale attenuation lengths [1]. In this regime, the embedded Mössbauer nuclei absorb and emit collectively into a super-position of these modes, with the resultant radiation field displaying pronounced interference beats on a micrometre scale. We show that this interference pattern leads to sub-radiance of the nuclear ensemble, with suppression of the dynamical beat at certain critical waveguide lengths. We also consider structuring the nuclear ensemble into micrometre scaled patches, and show that it is feasible to engineer the resultant inter-nuclear coupling to create mesoscopic and hopping models [2], with potential for applications in quantum simulation and experimental exploration of mesoscopic quantum dynamics and topological physics.
[1] https://doi.org/10.1364/opticaopen.24028686.v2
[2] https://doi.org/10.48550/arXiv.2305.11647
Keywords: Waveguide QED; Moessbauer effect; X-ray; Nuclear resonant scattering