Superconducting quantum node for entanglement and storage of microwave radiation

Superconducting circuits and microwave signals are good candidates to realize quantum networks, which are the backbone of quantum computers. We have realized a quantum node based on a 3D microwave superconducting cavity parametrically coupled to a transmission line by a Josephson ring modulator. We...

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Bibliographic Details
Published in:Physical review letters 2015-03, Vol.114 (9), p.090503-090503, Article 090503
Main Authors: Flurin, E, Roch, N, Pillet, J D, Mallet, F, Huard, B
Format: Article
Language:English
Subjects:
Channels
Circuits
Holes
Microwaves
Modulators
Optimization
Physics
Quantum Physics
Superconductivity
Three dimensional
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Summary:Superconducting circuits and microwave signals are good candidates to realize quantum networks, which are the backbone of quantum computers. We have realized a quantum node based on a 3D microwave superconducting cavity parametrically coupled to a transmission line by a Josephson ring modulator. We first demonstrate the time-controlled capture, storage, and retrieval of an optimally shaped propagating microwave field, with an efficiency as high as 80%. We then demonstrate a second essential ability, which is the time-controlled generation of an entangled state distributed between the node and a microwave channel.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.114.090503