Multi-qubit entanglement engineering via projective measurements

TL;DR

This paper proposes a scheme to generate various multi-qubit entangled states using projective measurements, enabling experimental realization with current technology and expanding the capabilities in quantum state engineering.

Contribution

It introduces a novel method for creating multiple SLOCC-inequivalent multi-qubit states via projective measurements on entangled states.

Findings

Feasible implementation with current technology

Single-set-up realization of multiple entangled states

Enhanced control over multi-qubit entanglement

Abstract

So far, various multi-photon entangled states have been observed experimentally by using different experimental set-ups. Here, we present a scheme to realize many SLOCC-inequivalent states of three and four qubits via projective measurements on suitable entangled states. We demonstrate how these states can be observed experimentally in a single set-up and study the feasibility of the implementation with present-day technology.