# Manipulation of Multimode Squeezing in a Coupled Waveguide Array

## TL;DR

This paper proposes a method to generate and control three-mode squeezed states with tripartite entanglement using coupled optical waveguides, highlighting polarization-dependent manipulation and robustness against losses for quantum applications.

## Contribution

It introduces a scheme for generating and manipulating multimode squeezed states in waveguide arrays with polarization-controlled selectivity, advancing quantum light sources.

## Key findings

- Quantum correlations are preserved despite losses.
- Polarization controls the type of squeezing generated.
- Waveguide arrays are effective platforms for multimode quantum light.

## Abstract

We present a scheme for generating and manipulating three-mode squeezed states with genuine tripartite entanglement by injecting single-mode squeezed light into an array of coupled optical waveguides. We explore the possibility to selectively generate single-mode squeezing or multimode squeezing at the output of an elliptical waveguides array, determined solely by the input light polarization. We study the effect of losses in the waveguides array and show that quantum correlations and squeezing are preserved for realistic parameters. Our results show that arrays of optical waveguides are suitable platforms for generating multimode quantum light, which could lead to novel applications in quantum metrology.