Overcoming noise in quantum teleportation with multipartite hybrid entanglement

Abstract

Quantum entanglement and decoherence are the two counterforces of many quantum technologies and protocols. For example, while quantum teleportation is fueled by a pair of maximally entangled resource qubits, it is vulnerable to decoherence. Here, we propose an efficient quantum teleportation protocol in the presence of pure decoherence and without entangled resource qubits entering the Bell-state measurement. Instead, we use multipartite hybrid entanglement between the auxiliary qubits and their local environments within the open–quantum system context. With a hybrid-entangled initial state, it is the decoherence that allows us to achieve high fidelities. We demonstrate our protocol in an all-optical experiment.

Asymptotic teleportation scheme bridging between standard and port-based teleportation

“…with u representing an arbitrary unitary operator. Since all operators act within the same space, we omitted the notation of operating space in equation (27).…”

“…Lipka-Bartosik et al [26] proved that this protocol could achieve teleportation fidelity equal to that of noiseless teleportation. Recent experimental approaches to overcome noise include the use of multipartite hybrid entanglement to protect against dephasing noise in a linear optical framework [27]. Additionally, quantum error correction codes [28,29] and weak measurements [30] are implemented in the quantum teleportation protocol.…”