Entangling successive single-photons from quantum dots

TL;DR

This paper introduces a method to generate and distinguish high-fidelity Bell states from consecutive single-photons emitted by quantum dots, using a non-symmetric beam splitter without nonlinear processes, advancing quantum mechanics testing.

Contribution

It presents a novel approach for Bell state generation from quantum dots that does not rely on nonlinear optical processes, simplifying the setup.

Findings

High-fidelity Bell states can be generated from quantum dots.

A non-symmetric beam splitter is essential for the method.

No nonlinear optical processes are needed.

Abstract

A method is proposed for generating and discriminating Bell states of high fidelity from consecutive single-photons generated in a semiconductor quantum dot. The use of a non-symmetric beam splitter is found to be essential and sufficient, and no nonlinear optical process such as SPDC is required at any stage. This should be of considerable importance for testing the foundations of quantum mechanics.