A one-way quantum amplifier for long-distance quantum communication



In this paper, a model for single photon amplification based on cluster-state quantum computation is proposed. A rescaling of the probability amplitudes of a deteriorated qubit in favor of the one-photon component will define the amplifier’s gain. Unlike the heralded quantum amplifiers, the probabilistic success of the whole process will not depend on the successful detection of a heralding signal. Instead, the whole procedure will rely upon a single-qubit measurement, which is simpler compared to any two-qubit interaction gate in the heralded quantum amplifiers. The proposed model can be used as a qubit protector against propagation losses in long-distance quantum communication networks.


Quantum communication Linear optics Noiseless linear amplifiers Cluster computation Entanglement 


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© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Faculty of EngineeringAin-Shams UniversityCairoEgypt

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