Teleportation goes to Hertz rate

Quantum teleportation has been developed to simultaneously realize the Hertz rate and the 64-km distance through fiber channels, which is essential to real-world application of quantum network.

For practical quantum teleportation network, in a newly published paper in Light: Science & Applications, the team led by Qiang Zhou from the Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China has reported an experimental realization of a Hertz-rate quantum teleportation system through a real-world fiber network 15 . The techniques of high-performance time-bin entangled source with a periodically poled lithium niobate (PPLN) waveguide and a fully running feedback system for quantum states distribution are employed, thus a weak coherent single photon with decoy state is transferred at a rate of 7.1 ± 0.4 Hz among different real-world buildings connected by 64-km-long fiber channel, as illustrated in Fig. 1. Furthermore, the average single-photon fidelity of ≥90.6 ± 2.6% is experimentally achieved.
It is foreseeable that the quantum teleportation can give rise to exciting inspirations for both advanced quantum technology and quantum network applications, as illustrated in Fig. 2 of the quantum teleportation sceneries. The high fidelity, high capacity and quantum memory are demanded in quantum teleportation, besides high rate and long distance as discussed in this work. Quantum network consists of quantum channels and quantum nodes 16,17 . On quantum channel, there are still improvement spaces for high performance quantum teleportation. The rate of quantum teleportation can be increased by improving efficiency and repetition rates of generation, manipulation and measurement. Besides improving indistinguishability, the high-quality quantum light source 18,19 and entanglement enhancement 20,21 provide

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Looking forward, while the quantum teleportation establishes an important foundation of quantum network, it also fosters inspirations to future possible applications. Quantum teleportation will play an essential role to realize quantum communication towards global scale 17,18 . Besides, quantum teleportation is potentially applied to distributed quantum computation 7 . Quantum teleportation can distribute local gate operations between distant users, and be used to link the distributed quantum computing units. This work establishes an important step from proof-of-principle demonstrations to real-world applications of quantum teleportation.

Quantum teleportation
Capacity Memory Fig. 2 Future vision of the quantum teleportation for quantum network application. The possible approaches for improving the performance of quantum teleportation is on the top part, and the potential applications of quantum teleportation is on the bottom part