Unconditional quantum teleportation between distant solidstate quantum bits
Abstract
Realizing robust quantum information transfer between longlived 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 photonmediated heralded entanglement between two distant electron spins and subsequently encode the source qubit in a single nuclear spin. By realizing a fully deterministic Bellstate measurement combined with realtime feedforward, 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 networkbased quantum computing.
 Publication:

Science
 Pub Date:
 August 2014
 DOI:
 10.1126/science.1253512
 arXiv:
 arXiv:1404.4369
 Bibcode:
 2014Sci...345..532P
 Keywords:

 PHYSICS, Physics, AppliedPhysics, Chemistry;
 Quantum Physics;
 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 14 pages, 10 figures