Experimental quantum teleportation of propagating microwaves

The field of quantum communication promises to provide efficient and unconditionally secure ways to exchange information, particularly, in the form of quantum states. Meanwhile, recent breakthroughs in quantum computation with superconducting circuits trigger a demand for quantum communication chann...

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Bibliographic Details
Published in:Science advances 2021-12, Vol.7 (52), p.eabk0891-eabk0891
Main Authors: Fedorov, Kirill G, Renger, Michael, Pogorzalek, Stefan, Di Candia, Roberto, Chen, Qiming, Nojiri, Yuki, Inomata, Kunihiro, Nakamura, Yasunobu, Partanen, Matti, Marx, Achim, Gross, Rudolf, Deppe, Frank
Format: Article
Language:English
Subjects:
Physical and Materials Sciences
Physical Sciences
SciAdv r-articles
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Summary:The field of quantum communication promises to provide efficient and unconditionally secure ways to exchange information, particularly, in the form of quantum states. Meanwhile, recent breakthroughs in quantum computation with superconducting circuits trigger a demand for quantum communication channels between spatially separated superconducting processors operating at microwave frequencies. In pursuit of this goal, we demonstrate the unconditional quantum teleportation of propagating coherent microwave states by exploiting two-mode squeezing and analog feedforward over a macroscopic distance of = 0.42 m. We achieve a teleportation fidelity of = 0.689 ± 0.004, exceeding the asymptotic no-cloning threshold. Thus, the quantum nature of the teleported states is preserved, opening the avenue toward unconditional security in microwave quantum communication.
ISSN:2375-2548
2375-2548
DOI:10.1126/sciadv.abk0891