Non-Hermitian topological ohmmeter
Measuring large electrical resistances is an essential part of common applications such as insulation testing, but it suffers from a fundamental problem: The larger the resistance, the less sensitive a canonical ohmmeter is. Here the authors use the topological properties of non-Hermitian matrices to design a multiple-current-source electrical circuit that functions as a highly precise ohmmeter. Both the sensitivity of the device and its signal-to-noise ratio increase exponentially as more and more current sources are included in the circuit, paving the way toward overcoming the intrinsic limitations of currently available measurement devices.
Authors
- Ion Cosma Fulga (ORCID: https://orcid.org/0000-0003-2249-039X)
- Jan Carl Budich (ORCID: https://orcid.org/0000-0002-9859-9626)
- Joseph Dufouleur (ORCID: https://orcid.org/0000-0003-4580-1920)
- Viktor Könye (ORCID: https://orcid.org/0000-0003-2900-9212)
- Jeroen van den Brink (ORCID: https://orcid.org/0000-0001-6594-9610)
- Kyrylo Ochkan
- Anastasiia Chyzhykova (ORCID: https://orcid.org/0009-0006-0231-3686)
Institutions
- Taras Shevchenko National University of Kyiv (UA)
- Leibniz Institute for Solid State and Materials Research (DE)
- Complexity, Topology and Dynamics in Quantum Matter (DE)
- Max Planck Institute for the Physics of Complex Systems (DE)
- Technische Universität Dresden (DE)
Publication Details
- Journal
- Physical Review Applied
- Published
- 2024-09-03
- DOI
- https://doi.org/10.1103/physrevapplied.22.l031001
- Citations
- 13
- Primary Topic
- Quantum Mechanics and Non-Hermitian Physics
- Type
- article
- Field-Weighted Citation Impact
- 4.05