Frequency-dependent squeezing via Einstein-Podolsky-Rosen entanglement based on silicon nitride microring resonators

TL;DR

This paper presents a silicon nitride microring resonator platform for generating frequency-dependent squeezing through EPR entanglement, advancing integrated quantum photonics for quantum sensing applications.

Contribution

It introduces a novel on-chip platform supporting multiple entangled quantum modes and demonstrates frequency-dependent squeezing via dispersion control in Kerr microresonators.

Findings

Supports at least 12 quantum modes with 6 EPR pairs

Achieves frequency-dependent squeezing by adjusting detection angles

Provides analysis under various dispersion conditions

Abstract

Significant efforts have been made to enhance the performance of displacement sensors limited by quantum noise, such as gravitational wave detectors. Techniques like frequency-dependent squeezing have overcome the standard quantum limit in optomechanical force measurements, leading to substantial overall progress. These advancements, coupled with major developments in integrated photonics, have paved the way for the emergence of integrated Kerr quantum frequency combs (QFCs). A platform has been established for designing EPR entangled quantum frequency combs using on-chip silicon nitride microring resonators, enabling thorough analysis and optimization of entanglement performance, as well as effective noise reduction adjustments. This platform, incorporating the quantum dynamics of Kerr nonlinear microresonators, supports at least 12 continuous-variable quantum modes in the form of 6 simultaneous two-mode squeezed pairs (EPR entangled pairs). Additionally, by selecting the detection angle of the idler mode, a single-mode squeezed state is generated in the signal mode. Given the frequency-dependent nature of the detection angle, frequency-dependent squeezing is achieved. A comparative analysis of the results under different dispersion conditions is also conducted.