Year: 2024
Type: article
Abstract: 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.
Source: Physical Review Applied
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W4402190132