Family of even/odd CV states, their properties and deterministic generation of the hybrid entangled states

TL;DR

This paper introduces a family of continuous variable states formed by superpositions of displaced number states, demonstrating their properties and a method for deterministic generation of hybrid entangled states using beam splitters and measurements.

Contribution

It presents a novel approach to generate hybrid entangled states from superpositions of displaced number states with specific properties and applicability to finite truncated states.

Findings

Maximally entangled states are generated at specific experimental parameters.

The introduced states exhibit nonclassical properties and distinctive Wigner function features.

The method is applicable to both infinite and finite truncated versions of the states.

Abstract

We consider a family of continuous variable (CV) states being a superposition of displaced number states with equal modulo but opposite in sign displacement amplitudes. Either an even or odd CV state is mixed with a delocalized photon at a beam splitter with arbitrary transmittance and reflectance coefficients with the subsequent registration of the measurement outcome in an auxiliary mode to deterministically generate hybrid entanglement. We show that at certain values of the experimental parameters maximally entangled states are generated. The considered approach is also applicable to truncated finite versions of even/odd CV states. We study the nonclassical properties of the introduced states and show their Wigner functions exhibit properties inherent to nonclassical states. Other nonclassical properties of the states under consideration have also been studied.