Dresden 2020 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 49: Topolectric Circuits and Quantum Hall Systems

TT 49.2: Talk

Wednesday, March 18, 2020, 17:30–17:45, HSZ 103

Reciprocal skin effect and its realization in a topolectrical circuit — •Tobias Helbig¹, Tobias Hofmann¹, Ching Hua Lee^2,3, Frank Schindler⁴, Titus Neupert⁴, Martin Greiter¹, and Ronny Thomale¹ — ¹Institut 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)