2014/04/30 by Wolfgang Pfaff, Bas Hensen, Hannes Bernien +13 · 3 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1126/science.1253512
published as Science 345, 532-535 (2014) · 14 pages, 10 figures; added supplementary material and DOI
openalex publication_date 2014/05/30 · arxiv created 2014/06/03 · arxiv updated 2014/12/02 · openalex created_date 2017/03/16 · openalex updated_date 2026/07/28
Realizing robust quantum information transfer between long-lived qubit registers is a key challenge for quantum information science and technology. Here we demonstrate unconditional teleportation of arbitrary quantum states between diamond spin qubits separated by 3 meters. We prepare the teleporter through photon-mediated heralded entanglement between two distant electron spins and subsequently encode the source qubit in a single nuclear spin. By realizing a fully deterministic Bell-state measurement combined with real-time feed-forward, quantum teleportation is achieved upon each attempt with an average state fidelity exceeding the classical limit. These results establish diamond spin qubits as a prime candidate for the realization of quantum networks for quantum communication and network-based quantum computing.