Arbitrary entanglement of three qubits via linear optics

TL;DR

This paper introduces a linear-optical method to generate any three-qubit entangled state using only three particles and post-selection, leveraging particle indistinguishability as a resource for entanglement.

Contribution

It presents a universal, particle-statistics-insensitive scheme for arbitrary three-qubit entanglement generation with consistent success probability.

Findings

Universal scheme for three-qubit entanglement

Insensitivity to particle statistics

Equal success probability for all states

Abstract

We present a linear-optical scheme for generation of an arbitrary state of three qubits. It requires only three independent particles in the input and post-selection of the coincidence-type at the output. The success probability of the protocol is equal for any desired state. Furthermore, the optical design remains insensitive to particle statistics (bosons, fermions or anyons). This approach builds upon the no-touching paradigm, which demonstrates the utility of particle indistinguishability as a resource of entanglement for practical applications.