Quantitative Study of Beam Splitter Generated Entanglement from Input States with Multiple Nonclassicality Inducing Operations

TL;DR

This paper investigates how beam splitters generate entanglement from complex optical states created by multiple nonclassicality-inducing operations, revealing non-monotonic behavior due to competing nonclassical effects.

Contribution

It analyzes beam splitter generated entanglement from states with multiple nonclassicality sources, uncovering non-monotonic entanglement behavior linked to competing nonclassical effects.

Findings

Beam splitter output entanglement varies non-monotonically with input nonclassicality parameters.

Counterintuitive entanglement behavior explained by competition between different nonclassicality sources.

Experimental parameters like photon number and squeezing influence entanglement non-monotonically.

Abstract

Continuous variable Beam Splitter (BS) generated entanglement from single mode optical states generated by single nonclassicality (NC) inducing operation have been found of immense importance in several information processing tasks. There exists a broader class of optical states, generated from successive action of multiple different NC-inducing operations, which show many intriguing nonclassical properties; however the BS conversion of the NC for such states remains unexplored. In this work we have critically analyzed the BS generated entanglement from such nonclassical optical states at input. Here we present a scenario where BS output entanglement becomes non-monotonic with the input NC parameters, amenable experimentally (e.g. number of photon excitation and squeezing strength), in contrast with the previous results with states comprising of single NC- inducing operation. We explain this counter intuitive feature in terms of the competition between the NCs induced by specific type of NC-inducing operations.