Entanglement plays a central role in fundamental tests of quantum mechanics as well as in the burgeoning field of quantum information processing. Particularly in the context of quantum networks and communication, a major challenge is the efficient generation of entanglement between stationary (spin) and flying (photon) qubits. Here we report the observation of quantum entanglement between a semiconductor quantum dot spin and the color of a propagating optical photon. As an extension experiment, we report the generation of a single-photon frequency qubit, interference of resonance fluorescence from two distant quantum dots and the teleportation from a flying photon to a quantum dot spin.

Date Published: 19 February 2014
PDF: 15 pages
Proc. SPIE 8997, Advances in Photonics of Quantum Computing, Memory, and Communication VII, 89970W (19 February 2014); doi: 10.1117/12.2043139

Published in SPIE Proceedings Vol. 8997:
Advances in Photonics of Quantum Computing, Memory, and Communication VII
Zameer U. Hasan; Philip R. Hemmer; Hwang Lee; Charles M. Santori, Editor(s)