Experimental realization of high-fidelity teleportation via non-Markovian open quantum system

TL;DR

This paper demonstrates experimentally that high-fidelity quantum teleportation can be achieved using non-Markovian open quantum systems, leveraging environmental degrees of freedom to enhance quantum resource utilization.

Contribution

It provides the first proof-of-principle experimental demonstration of quantum teleportation via non-Markovian open systems, showing resources can be harnessed from environmental degrees of freedom.

Findings

Successful teleportation with high fidelity using non-Markovian environment.

Quantum resources can be extracted from environmental degrees of freedom.

Demonstrates practical implementation of open system quantum protocols.

Abstract

Open quantum systems and study of decoherence are important for our fundamental understanding of quantum physical phenomena. For practical purposes, there exists a large number of quantum protocols exploiting quantum resources, e.g. entanglement, which allows to go beyond what is possible to achieve by classical means. We combine concepts from open quantum systems and quantum information science, and give a proof-of-principle experimental demonstration -- with teleportation -- that it is possible to implement efficiently a quantum protocol via non-Markovian open system. The results show that, at the time of implementation of the protocol, it is not necessary to have the quantum resource in the degree of freedom used for the basic protocol -- as long as there exists some other degree of freedom, or environment of an open system, which contains useful resources. The experiment is based on a pair of photons, where their polarizations act as open system qubits and frequencies as their environments -- while the path degree of freedom of one of the photons represents the state of Alice's qubit to be teleported to Bob's polarization qubit.