Conditional Generation Scheme for Entangled Vacuum Evacuated Coherent States by Mixing Two Coherent Beams with a Squeezed Vacuum State

TL;DR

This paper proposes a method to generate high-purity entangled vacuum-evacuated coherent states using beam splitters with squeezed and coherent inputs, controlled by phase and amplitude adjustments, achieving amplitudes up to 2.160.

Contribution

It introduces a novel conditional scheme for producing entangled vacuum-evacuated coherent states with high purity by mixing squeezed and coherent states in a cascade of beam splitters.

Findings

High-purity entangled states achieved up to alpha=2.160.

Control over amplitudes and phases enables state manipulation.

Effective generation conditions identified for specific quantum states.

Abstract

Conditions to generate high-purity entangled vacuum-evacuated coherent states ($|0>|\alpha>^0 - |-\alpha>^0 |0>$ were studied for two cascade-placed beam splitters, with one squeezed state input and two coherent state inputs whenever a single photon is detected. Controlling the amplitudes and the phases of the beams allows for various amplitudes of the vacuum-evacuated coherent states ($|\alpha>^ 0 = |\alpha> -e^{-|\alpha|^2} |0> $) up to $\alpha = 2.160$ to be manipulated with high-purity.