Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 49: Topolectric Circuits and Quantum Hall Systems

TT 49.2: Vortrag

Mittwoch, 18. März 2020, 17:30–17:45, HSZ 103

Reciprocal skin effect and its realization in a topolectrical circuit — •Tobias Helbig1, Tobias Hofmann1, Ching Hua Lee2,3, Frank Schindler4, Titus Neupert4, Martin Greiter1, and Ronny Thomale11Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg — 2Department of Physics, National University of Singapore, Singapore 117542 — 3Institute of High Performance Computing, A*STAR, Singapore 138632 — 4Department of Physics, University of Zurich, 8057 Zurich, Switzerland

The non-Hermitian Skin effect heralds the start of a new paradigm in synthetic metamaterial research. The newly established notion of the Skin effect requires specifically tailored gain and loss in combination with a necessary breaking of reciprocity. In this talk we extend this viewpoint and present a model which shows extensive eigenmode localization for open boundaries despite preserving reciprocity. In contrast to non-reciprocal implementations of the Skin effect, which require an external supply of energy, this model can be realized by using exclusively passive components. We experimentally demonstrate this novel phenomenon in a passive RLC circuit network. The reciprocal Skin effect suggests itself for realization in a plethora of metamaterial platforms with limited availability of active components.

[1] T. Hofmann et al. , arXiv: 1908.02759 (2019)

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