Catching Time-Reversed Microwave Coherent State Photons with 99.4% Absorption Efficiency

We demonstrate a high-efficiency deterministic quantum receiver to convert flying qubits to stationary qubits. We employ a superconducting resonator, which is driven with a shaped pulse through an adjustable coupler. For the ideal "time-reversed" shape, we measure absorption and receiver f...

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Bibliographic Details
Published in:Physical review letters 2014-05, Vol.112 (21), Article 210501
Main Authors: Wenner, J., Yin, Yi, Chen, Yu, Barends, R., Chiaro, B., Jeffrey, E., Kelly, J., Megrant, A., Mutus, J. Y., Neill, C., O’Malley, P. J. J., Roushan, P., Sank, D., Vainsencher, A., White, T. C., Korotkov, Alexander N., Cleland, A. N., Martinis, John M.
Format: Article
Language:English
Subjects:
Coherence
Fault tolerance
Flying
Microwaves
Photons
Qubits (quantum computing)
Receivers
Superconductivity
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Summary:We demonstrate a high-efficiency deterministic quantum receiver to convert flying qubits to stationary qubits. We employ a superconducting resonator, which is driven with a shaped pulse through an adjustable coupler. For the ideal "time-reversed" shape, we measure absorption and receiver fidelities at the single microwave photon level of, respectively, 99.41% and 97.4%. These fidelities are comparable with gates and measurement and exceed the deterministic quantum communication and computation fault-tolerant thresholds, enabling new designs of deterministic qubit interconnects and hybrid quantum computers.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.112.210501