# Enhancing parameter estimation precision in dissipative environment with two-photon driving

## TL;DR

This paper demonstrates that two-photon driving significantly enhances frequency estimation precision in dissipative environments, enabling ultrasensitive measurements over long times by counteracting noise effects.

## Contribution

It introduces the use of two-photon driving to improve measurement precision in noisy, dissipative settings, showing near-zero uncertainty with proper parameters.

## Key findings

- Two-photon driving improves noise resistance in frequency estimation.
- Proper two-photon drive can reduce uncertainty close to zero over time.
- Without two-photon driving, uncertainty diverges to infinity.

## Abstract

We investigate the frequency estimation of an optical field suffering from an unavoidable dissipative environment. Generally, dissipative noises greatly reduce the precision. Here, we find that two-photon driving can improve the measurement precision by resisting the noises. Moreover, in long time, the uncertainty of frequency can be close to 0 with a proper magnitude of the parametric two-photon drive, which is in sharp contrast to the uncertainty going to infinity without the two-photon driving. Our results show that two-photon driving can realize the ultrasensitive measurement in dissipative environment under the long-encoding-time condition.