High-Purity Pulsed Squeezing Generation with Integrated Photonics

TL;DR

This paper introduces a novel integrated photonics method for generating high-purity pulsed squeezed light with low pump power, enhancing quantum technology applications by improving temporal mode purity and scalability.

Contribution

It proposes a new cavity-based approach to produce pulsed squeezing with near-unity mode purity, overcoming limitations of conventional methods.

Findings

Effective mode number approaches unity, indicating high purity.

Broad parameter range allows low pump power operation.

Suitable for large-scale quantum resource generation.

Abstract

Squeezed light has evolved into a powerful tool for quantum technology, ranging from quantum enhanced sensing and quantum state engineering based on partial post-selection techniques. The pulsed generation of squeezed light is of particular interest, as it can provide accurate time stamp and physically defined temporal mode, which are highly preferred in complex communication networks and large-scale information processing. However, the multimode feature of pulsed squeezing in conventional single-pass configuration limits the purity of the output state, negatively impacting its application in quantum technology. In this Letter, we propose a new approach to generate pulsed squeezing with high temporal purity. Pulsed squeezing based on parametric down-conversion in photonic cavities is analyzed. We show that the effective mode number of the output squeezed light approaches unity. Such a high-purity squeezed light can be realized with broad parameters and low pump power, providing a robust approach to generate large-scale quantum resource.