Entanglement transfer, accumulation and retrieval via quantum-walk-based qubit-qudit dynamics

TL;DR

This paper introduces a versatile protocol using quantum walks to generate, transfer, and accumulate high-dimensional entanglement in quantum systems, with a potential photonic implementation.

Contribution

It presents a novel quantum-walk-based method for entangling high-dimensional systems, enhancing control over quantum correlations for advanced quantum technologies.

Findings

Protocol successfully generates high-dimensional entanglement

Quantum walk-based transfer and accumulation demonstrated

Potential for implementation in photonic systems

Abstract

The generation and control of quantum correlations in high-dimensional systems is a major challenge in the present landscape of quantum technologies. Achieving such non-classical high-dimensional resources will potentially unlock enhanced capabilities for quantum cryptography, communication and computation. We propose a protocol that is able to attain entangled states of $d$-dimensional systems through a quantum-walk-based {\it transfer \& accumulate} mechanism involving coin and walker degrees of freedom. The choice of investigating quantum walks is motivated by their generality and versatility, complemented by their successful implementation in several physical systems. Hence, given the cross-cutting role of quantum walks across quantum information, our protocol potentially represents a versatile general tool to control high-dimensional entanglement generation in various experimental platforms. In particular, we illustrate a possible photonic implementation where the information is encoded in the orbital angular momentum and polarization degrees of freedom of single photons.