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Noise resilient exceptional-point voltmeters enabled by oscillation quenching phenomena

Author

Listed:
  • Arunn Suntharalingam

    (Wesleyan University)

  • Lucas Fernández-Alcázar

    (IMIT (CONICET - UNNE)
    Northeastern University of Argentina)

  • Rodion Kononchuk

    (Wesleyan University)

  • Tsampikos Kottos

    (Wesleyan University)

Abstract

Exceptional point degeneracies (EPD) of linear non-Hermitian systems have been recently utilized for hypersensitive sensing. This proposal exploits the sublinear response that the degenerate frequencies experience once the system is externally perturbed. The enhanced sensitivity, however, might be offset by excess (fundamental and/or technical) noise. Here, we developed a self-oscillating nonlinear platform that supports transitions between two distinct oscillation quenching mechanisms – one having a spatially symmetric steady-state, and the other with an asymmetric steady-state – and displays nonlinear EPDs (NLEPDs) that can be employed for noise-resilient sensing. The experimental setup incorporates a nonlinear electronic dimer with voltage-sensitive coupling and demonstrates two-orders signal-to-noise enhancement of voltage variation measurements near NLEPDs. Our results resolve a long-standing debate on the efficacy of EPD-sensing in active systems above self-oscillating threshold.

Suggested Citation

  • Arunn Suntharalingam & Lucas Fernández-Alcázar & Rodion Kononchuk & Tsampikos Kottos, 2023. "Noise resilient exceptional-point voltmeters enabled by oscillation quenching phenomena," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41189-7
    DOI: 10.1038/s41467-023-41189-7
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    References listed on IDEAS

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    1. Xuewei Zhang & Chaohua Wu & Mou Yan & Ni Liu & Ziyu Wang & Gang Chen, 2024. "Observation of continuum Landau modes in non-Hermitian electric circuits," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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