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

The frequency estimation of an optical cavity field suffering from an unavoidable dissipative environment is investigated. Generally, dissipative noise significantly reduces the precision. Here, it is found that two-photon driving can improve measurement precision by resisting the noise. Moreover, over a long duration, the frequency uncertainty can be minimized with the right magnitude of the parametric two-photon drive, which is in sharp contrast to the uncertainty tending to infinity without two-photon driving. The results show that two-photon driving can achieve ultrasensitive measurement in a dissipative environment under the long-encoding-time condition.