Reciprocal skin effect and its realization in a topolectrical circuit

ORAL

Abstract

The non-Hermitian Skin effect constitutes a new paradigm in synthetic metamaterial research. The established notion of the Skin effect requires specifically tailored gain and loss conspiring with the breaking of reciprocity. In this talk we present a model which shows extensive eigenmode localization at its boundaries while preserving reciprocity. In contrast to non-reciprocal implementations of the Skin effect requiring external energy supply, this model can be realized with exclusively passive components. We demonstrate this novel phenomenon in a passive RLC circuit network. The reciprocal Skin effect suggests itself for realizations in further metamaterial platforms with limited availability of active components.

[1] T. Hofmann, et al., arxiv:1908.02759 (2019)
[2] T. Helbig, et al., arxiv:1907.11619 (2019)
[3] T. Hofmann, et al., Phys. Rev. Lett. 122, 247702 (2019)
[4] T. Helbig, et al., Phys. Rev. B 99, 161114 (2019)
[5] S. Imhof, et al., Nature Physics 14, 925 (2018)
[6] C. H. Lee, et al., Commun. Phys. 1, 39 (2018)

*Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project-ID 258499086 - SFB 1170 and through the Wueurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter - ct.qmat Project-ID 39085490 - EXC 2147

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Presenters

  • Tobias Hofmann

    • Theoretical physics I, University of Wuerzburg
    • Institute for Theoretical Physics and Astrophysics, University of Wurzburg
    • University of Wurzburg

Authors

  • Tobias Hofmann

    • Theoretical physics I, University of Wuerzburg
    • Institute for Theoretical Physics and Astrophysics, University of Wurzburg
    • University of Wurzburg

  • Tobias Helbig

    • Theoretical physics I, University of Wuerzburg
    • Institute for Theoretical Physics and Astrophysics, University of Wurzburg
    • University of Wurzburg

  • Frank Schindler

    • University of Zurich
    • Department of Physics, University of Zurich

  • Ching Hua Lee

    • Department of Physics, National University of Singapore
    • National University of Singapore

  • Martin Greiter

    • Institute for Theoretical Physics and Astrophysics, University of Wurzburg
    • University of Wurzburg

  • Titus Neupert

    • Univ of Zurich
    • University of Zurich
    • Department of Physics, University of Zurich
    • Physics, University of Zurich

  • Ronny Thomale

    • University of Wurzburg
    • Institute for Theoretical Physics, University of Wuerzburg
    • Theoretical physics I, University of Wuerzburg
    • University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg
    • Physics department, University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, University of Würzburg
    • Institute for Theoretical Physics and Astrophysics, University of Wurzburg