High-fidelity quantum teleportation achieved for the first time

A viable quantum Internet – a network that shares information stored on qubits over long distances – would transform data storage, the fields of precision detection and computing, creating a new era of communication.

This month, scientists from the National Laboratory of Science at the U.S. Department of Energy’s Fermilab office and their partners have taken an important step toward the realization of the quantum internet.

In a paper published in Like PRX, the group presents for the first time a demonstration of long-distance (44 km of fiber) teleportation with a photon qubit (quantum light) fidelity of over 90%. The chips were teleported via a fiber-optic network using state-of-the-art photon detectors and shelf equipment.

“We are pleased with these results,” said scientist Fermilab Panagiotis Spentzouris, head of the Fermilab quantum science program and one of the authors of the article. “Global communication is a key achievement in building a technology that will redefine how we perform.”

High fidelity quantum teleportation

In the high-fidelity quantum teleportation exhibition at the Fermilab Quantum Network, fiber-optic cables connect low-end devices (shown above) as well as state-of-the-art R&D devices. Credit: Fermilab

Quantum teleportation is a “disembodied” transfer from one location of quantum states to another. Quantum teleportation of a qubit is achieved using quantum entanglement, in which two or more particles cannot be interconnected. If an intricate pair of particles is distributed between two different locations, regardless of the distance between them, the encoded information is teleported.

Joint team – Fermilab, AT&T, Caltech, Harvard University researchers, NASA Jet Propulsion Laboratory and the University of Calgary successfully televised qubits in two systems: the Caltech Quantum Network or CQNET and the Fermilab Quantum Network or FQNET. The system designed, built, commissioned, and deployed public-private research programs on Caltech’s intelligent quantum networks and technologies or IN-Q-NET.

“We are very proud to have achieved this milestone in sustainable, high-performance and scalable quantum teleportation,” said Maria Spiropulu Shang-Yi Ch’en, a physics professor at Caltech and director of the IN-Q-NET research program. “The results will be further improved with the upgrade of the system we hope to complete by 2021.”

CQNET and FQNET, which have almost autonomous data processing, are compatible with existing telecommunications infrastructures and emerging quantum processing and storage devices. Researchers are using intricate distribution fidelity and rate improvement to emphasize complex quantum communication protocols and basic science.

That achievement came just a month after the U.S. Department of Energy unveiled its national quantum internet plan at a press conference in Chicago.

“With this demonstration we have begun to lay the groundwork for building a quantum network in Chicago,” Spentzouris said. The Chicagoland network, called the Illinois Express Quantum Network, is being designed by Fermilab in conjunction with the Caltech Argonne National Laboratory. Northwestern University and industry partners.

This research was supported by the DOE’s Office of Science through the Quantum Information Science-Enabled Discovery (QuantISED) program.

“The feat is a testament to the success of interdisciplinary and inter-agency collaboration, which drives much of what we achieve in science,” said Joe Lykken, deputy director of Fermilab Research. “I commend the IN-Q-NET team and our academia and industry partners for this outstanding achievement in quantum teleportation.”

References: Raju Valivarthi, Samantha I. Davis, Cristián Peña, Si Xie, Nikolai Lauk, Lautaro Narváez, Jason P. Allmaras, Andrew D. Beyer, Yewon Gim, Meraj Hussein, George Iskander, “Teleportation Systems Toward a Quantum Internet.” Hyunseong Linus Kim, Boris Korzh, Andrew Mueller, Mandy Rominsky, Matthew Shaw, Dawn Tang, Emma E. Wollman, Christoph Simon, Panagiotis Spentzouris, Daniel Oblak, Neil Sinclair and Maria Spiropulu, December 4, 2020, Like PRX.
DOI: 10.1103 / PRXQuantum.1.020317

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