Enhanced detection of electric field signals via squeezing-induced stochastic resonance

TL;DR

This paper introduces a novel squeezing-induced stochastic resonance method using a trapped ion system, significantly enhancing weak electric-field signal detection without additional noise sources.

Contribution

The study demonstrates experimentally that phase noise squeezing in a trapped ion system amplifies electric signals, improving detection sensitivity over traditional stochastic resonance methods.

Findings

Achieved a 4.28 ± 0.39 dB increase in signal-to-noise ratio.

Demonstrated no auxiliary noise source is needed for enhancement.

Proposed a promising approach for atomic ion electric-field sensors.

Abstract

Stochastic resonance (SR) could amplify weak electric-field signals in nonlinear systems by means of the externally injected noises. Here we propose and experimentally demonstrate a modified SR method, termed squeezing-induced SR, implemented in the system involving a trapped ion behaving as a Duffing oscillator. We find that squeezing the phase noise of the oscillator results in amplified fluctuation of the corresponding amplitude, which helps achieve the SR. Since no auxiliary noise source is needed, the squeezing-induced SR may enhance the signal-to-noise ratio by 4.28 $\pm$ 0.39 dB compared to the conventional noise-induced SR under identical conditions of the electric-field detection. This technique offers a promising approach for developing atomic ion sensors for detecting weak electric-field signals.