Yokohama researchers teleport quantum information into a diamond

July 9, 2019
Reliable quantum state transfer of photon polarization into a carbon isotope nuclear spin coupled to a nitrogen-vacancy center in diamond is achieved.
Nature via Yokohama National University
Quantum states of a photon have been teleported (transferred by entanglement) into a diamond, improving the viability of quantum repeaters and distributed quantum computers.
Quantum states of a photon have been teleported (transferred by entanglement) into a diamond, improving the viability of quantum repeaters and distributed quantum computers.
Quantum states of a photon have been teleported (transferred by entanglement) into a diamond, improving the viability of quantum repeaters and distributed quantum computers.
Quantum states of a photon have been teleported (transferred by entanglement) into a diamond, improving the viability of quantum repeaters and distributed quantum computers.
Quantum states of a photon have been teleported (transferred by entanglement) into a diamond, improving the viability of quantum repeaters and distributed quantum computers.
Quantum states of a photon have been teleported (transferred by entanglement) into a diamond, improving the viability of quantum repeaters and distributed quantum computers.

Quantum teleportation is a key principle for quantum information technology. It permits the transfer of quantum information into an otherwise inaccessible space, while also permitting the transfer of photon information into a quantum memory without revealing or destroying the stored quantum information.

In this Nature article (see source at end of this post), researchers from Yokohama National University (Yokohama, Japan) show reliable quantum state transfer of photon polarization into a carbon isotope nuclear spin coupled to a nitrogen-vacancy center in diamond based on photon-electron Bell state measurement by photon absorption.

The carbon spin is first entangled with the electron spin, which is then permitted to absorb a photon into a spin-orbit correlated eigenstate. Detection of the electron after relaxation into the spin ground state allows post-selected transfer of arbitrary photon polarization into the carbon memory.

The quantum state transfer scheme allows individual addressing of integrated quantum memories to realize scalable quantum repeaters for long-haul quantum communications, and distributed quantum computers for large-scale quantum computation and metrology.

SOURCE: Nature; https://www.nature.com/articles/s42005-019-0158-0

About the Author

Gail Overton | Senior Editor (2004-2020)

Gail has more than 30 years of engineering, marketing, product management, and editorial experience in the photonics and optical communications industry. Before joining the staff at Laser Focus World in 2004, she held many product management and product marketing roles in the fiber-optics industry, most notably at Hughes (El Segundo, CA), GTE Labs (Waltham, MA), Corning (Corning, NY), Photon Kinetics (Beaverton, OR), and Newport Corporation (Irvine, CA). During her marketing career, Gail published articles in WDM Solutions and Sensors magazine and traveled internationally to conduct product and sales training. Gail received her BS degree in physics, with an emphasis in optics, from San Diego State University in San Diego, CA in May 1986.

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