Regensburg 2025 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 53: Topology: Other Topics

TT 53.9: Talk

Friday, March 21, 2025, 11:45–12:00, H32

Polarization-Induced Topology in Quantum Emitter Chains — •Jonathan Sturm and Adriana Pálffy — Julius-Maximilians-Universität Würzburg

Synthetic quantum matter has become a field of strongly growing interest over the past decade due to its versatility, adaptibility, and applicability in areas like quantum simulation and others. One particulary suited platform for engineered quantum systems are arrays of quantum emitters, which can be optically excited and couple by the exchange of virtual photons [1].

We theoretically study a quantum emitter implementation of the Su-Schrieffer-Heeger model. Different from earlier studies [2], we show that for certain chain geometries the topological invariant depends on the polarization of the chain, allowing us to alter the topology without altering the lattice. Moreover, we demonstrate how this mechanism can be used for a topological pumping protocol enabling controlled transport of photons through the chain.

[1] M. Reitz et al., PRX Quantum 3, 010201 (2022).

[2] B. X. Wang and C. Y. Zhao, Phys. Rev. A 98, 023808 (2018).

Keywords: Topology; Quantum optics; Photonics