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Article Dans Une Revue Nature Photonics Année : 2022

A quantum-bit encoding converter

B. E. Asenbeck
  • Fonction : Auteur
Giovanni Guccione
  • Fonction : Auteur
Adrien Cavaillès
  • Fonction : Auteur
H. Le Jeannic

Résumé

From telecommunication to computing architectures, the realm of classical information hinges on converter technology to enable the exchange of data between digital and analog formats, a process now routinely performed across a variety of electronic devices. A similar exigency exists as well in quantum information technology where different frameworks are being developed for quantum computing, communication, and sensing. Thus, efficient quantum interconnects are a major need to bring these parallel approaches together and scale up quantum information systems. So far, however, the conversion between different optical quantum-bit encodings has remained challenging due to the difficulty of preserving fragile quantum superpositions and the demanding requirements for postselection-free implementations. Here we demonstrate such a conversion of quantum information between the two main paradigms, namely discrete- and continuous-variable qubits. We certify the protocol on a complete set of single-photon qubits, successfully converting them to cat-state qubits with fidelities exceeding the classical limit. Our result demonstrates an essential tool for enabling interconnected quantum devices and architectures with enhanced versatility and scalability.
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Dates et versions

hal-03864906 , version 1 (22-11-2022)
hal-03864906 , version 2 (03-11-2023)

Identifiants

Citer

Tom Darras, B. E. Asenbeck, Giovanni Guccione, Adrien Cavaillès, H. Le Jeannic, et al.. A quantum-bit encoding converter. Nature Photonics, 2022, 17, pp.165-170. ⟨10.1038/s41566-022-01117-5⟩. ⟨hal-03864906v2⟩
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