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Updated: Jul 17, 2025

Fabrication and Testing of Microfluidic Optomechanical Oscillators
Published on: May 29, 2014
Noise resilient exceptional-point voltmeters enabled by oscillation quenching phenomena
Arunn Suntharalingam1, Lucas Fernández-Alcázar2,3, Rodion Kononchuk1
1Wave Transport in Complex Systems Lab, Department of Physics, Wesleyan University, Middletown, CT, USA.
This study introduces nonlinear exceptional point degeneracies (NLEPDs) in self-oscillating systems for noise-resilient sensing. The developed platform enhances signal-to-noise ratio, overcoming limitations of traditional hypersensitive sensing methods.
Area of Science:
- Non-Hermitian physics
- Nonlinear dynamics
- Sensing technologies
Background:
- Exceptional point degeneracies (EPDs) in linear non-Hermitian systems offer hypersensitive sensing capabilities.
- Enhanced sensitivity near EPDs can be compromised by inherent system noise, limiting practical applications.
Purpose of the Study:
- To develop a noise-resilient sensing platform utilizing nonlinear exceptional point degeneracies (NLEPDs).
- To investigate the efficacy of NLEPD-based sensing in active, self-oscillating systems.
Main Methods:
- Development of a self-oscillating nonlinear electronic dimer with voltage-sensitive coupling.
- Exploitation of transitions between symmetric and asymmetric steady-states to achieve NLEPDs.
- Experimental demonstration of sensing near NLEPDs.
Main Results:
- Demonstrated a nonlinear platform exhibiting NLEPDs for sensing applications.
- Achieved a two-order signal-to-noise enhancement in voltage variation measurements near NLEPDs.
- Showcased noise resilience in sensing performance.
Conclusions:
- The developed nonlinear platform with NLEPDs enables robust and highly sensitive measurements.
- This work resolves debates on the effectiveness of EPD-sensing in active systems above the self-oscillation threshold.
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