Generation of phase-squeezed optical pulses with large coherent amplitudes by post-selection of single photon and weak cross-Kerr non-linearity

TL;DR

This paper proposes an experimental method to generate phase-squeezed optical pulses with large coherent amplitudes using single-photon post-selection and weak cross-Kerr non-linearity, enhancing optical phase measurement precision.

Contribution

It introduces a novel scheme combining a Mach-Zehnder interferometer, Kerr non-linearity, and post-selection to produce high-amplitude phase-squeezed light pulses.

Findings

Successful generation of phase-squeezed pulses with large amplitudes.

Enhanced phase estimation precision demonstrated.

Feasible experimental setup for practical implementation.

Abstract

Phase-squeezed light can enhance the precision of optical phase estimation. The larger the photon numbers are and the stronger the squeezing is, the better the precision will be. We propose an experimental scheme for generating phase-squeezed light pulses with large coherent amplitudes. In our scheme, one arm of a single-photon Mach-Zehnder interferometer interacts with coherent light via a non-linear optical Kerr medium to generate a coherent superposition state. Post-selecting the single photon by properly tuning a variable beam splitter in the interferometer yields a phase-squeezed output.