Exploration of photon-number entangled states using weak nonlinearities

TL;DR

This paper proposes a method to generate and detect photon-number entangled states across different scales using weak nonlinearities, analyzing feasibility and error probabilities with current technology.

Contribution

It introduces a novel approach for exploring photon-number entanglement with weak nonlinearities, applicable from microscopic to macroscopic systems.

Findings

Photon-number entangled states can be created and detected at various scales.

Maximal phase shift is proportional to photon numbers in the proposed architecture.

Feasibility of the method is supported by analysis of error probabilities without decoherence.

Abstract

A method for exploring photon-number entangled states with weak nonlinearities is described. We show that it is possible to create and detect such entanglement at various scales, ranging from microscopic to macroscopic systems. In the present architecture, we suggest that the maximal phase shift induced in the process of interaction between photons is proportional to photon numbers. Also, in the absence of decoherence we analyze maximum error probability and show its feasibility with current technology.