Optomechanical quantum teleportation

Quantum teleportation, the faithful transfer of an unknown input state onto a remote quantum system 1 , is a key component in long-distance quantum communication protocols 2 and distributed quantum computing 3 , 4 . At the same time, high-frequency nano-optomechanical systems 5 hold great promise as...

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Bibliographic Details
Published in:Nature photonics 2021-11, Vol.15 (11), p.817-821
Main Authors: Fiaschi, Niccolò, Hensen, Bas, Wallucks, Andreas, Benevides, Rodrigo, Li, Jie, Alegre, Thiago P. Mayer, Gröblacher, Simon
Format: Article
Language:English
Subjects:
639/766/483
639/925/927
Applied and Technical Physics
Communication
Letter
Nodes
Optics
Photonic crystals
Photonics
Physics
Physics and Astronomy
Quantum computing
Quantum entanglement
Quantum phenomena
Quantum Physics
Quantum teleportation
Qubits (quantum computing)
Wavelengths
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Summary:Quantum teleportation, the faithful transfer of an unknown input state onto a remote quantum system 1 , is a key component in long-distance quantum communication protocols 2 and distributed quantum computing 3 , 4 . At the same time, high-frequency nano-optomechanical systems 5 hold great promise as nodes in a future quantum network 6 , operating on-chip at low-loss optical telecom wavelengths with long mechanical lifetimes. Recent demonstrations include entanglement between two resonators 7 , a quantum memory 8 and microwave-to-optics transduction 9 – 11 . Despite these successes, quantum teleportation of an optical input state onto a long-lived optomechanical memory is an outstanding challenge. Here we demonstrate quantum teleportation of a polarization-encoded optical input state onto the joint state of a pair of nanomechanical resonators. Our protocol also allows to store and retrieve an arbitrary qubit state onto a dual-rail encoded optomechanical quantum memory. This work demonstrates the full functionality of a single quantum repeater node and presents a key milestone towards applications of optomechanical systems as quantum network nodes. Quantum teleportation of a photonic qubit into mechanical modes of two silicon photonic crystal nanobeams is demonstrated. It allows to store and retrieve an arbitrary qubit state onto a dual-rail encoded long-lived optomechanical quantum memory.
ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-021-00866-z