# Squeezing and EPR correlation in the Mirrorless Optical Parametric Oscillator

## TL;DR

This paper investigates the quantum properties of twin beams produced by a mirrorless optical parametric oscillator, demonstrating it can generate high-quality squeezing and EPR correlations near threshold, comparable to cavity-based systems.

## Contribution

It reveals that mirrorless optical parametric oscillators can produce significant quantum correlations without a cavity, expanding potential applications in quantum optics.

## Key findings

- High levels of narrowband squeezing near threshold
- Generation of strong EPR correlations
- Comparable quantum properties to cavity-based OPOs

## Abstract

This work analyses the quantum properties of counter-propagating twin beams generated by a Mirrorless Optical Parametric Oscillator in the continuous variable regime. Despite the lack of the filtering effect of a cavity, we show that in the vicinity of its threshold it may generate high levels of narrowband squeezing and Einstein-Podolsky-Rosen (EPR) correlation, completely comparable to what can be obtained in standard optical parametric oscillators.