Non-Markovianity in High-Dimensional Open Quantum Systems using Next-generation Multicore Optical Fibers

TL;DR

This paper investigates non-Markovian effects in high-dimensional open quantum systems within multicore optical fibers, demonstrating non-Markovian behavior and its implications for quantum communication protocols.

Contribution

It introduces a novel experimental study of non-Markovian dynamics in multicore fibers, using quantum operations to model environmental phase-flip noise.

Findings

Non-Markovian behavior observed in high-dimensional quantum systems

Experimental demonstration via Quantum Vault protocol

Insights into phase-noise effects for future telecom quantum networks

Abstract

With the advent of quantum technology, the interest in communication tasks assisted by quantum systems has increased both in academia and industry. Nonetheless, the transmission of a quantum state in real-world scenarios is bounded by environmental noise, so that the quantum channel is an open quantum system. In this work, we study a high-dimensional open quantum system in a multicore optical fiber by characterizing the environmental interaction as quantum operations corresponding to probabilistic phase-flips. The experimental platform is currently state-of-the-art for quantum information processing with multicore fibers. At a given evolution stage we observe a non-Markovian behaviour of the system, which is demonstrated through a proof-of-principle implementation of the Quantum Vault protocol. A better understanding of phase-noise in multicore fibers will improve several real-world communication protocols, since they are a prime candidate to be adopted in future telecom networks.