Low frequency phase signal measurement with high frequency squeezing

TL;DR

This paper explores how high-frequency squeezed states can enhance low-frequency phase measurements in two-frequency interferometry, proposing a practical approach with potential experimental validation.

Contribution

It introduces a method using high-frequency squeezed light and two-frequency lasers to improve low-frequency phase sensing, addressing contamination issues and feasibility.

Findings

High-frequency squeezing improves low-frequency phase measurement sensitivity.

Contamination from high-frequency phase vibrations can be managed effectively.

Experimental demonstration is feasible with current quantum optics technology.

Abstract

We calculate the utility of high-frequency squeezed-state enhanced two-frequency interferometry for low-frequency phase measurement. To use the high-frequency sidebands of the squeezed light, a two-frequency intense laser is used in the interferometry instead of a single-frequency laser as usual. We find that the readout signal can be contaminated by the high-frequency phase vibration, but this is easy to check and avoid. A proof-of-principle experiment is in the reach of modern quantum optics technology.