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Superconducting Qubits
Sub-shot-noise-limited fiber-optic quantum receiver
arXiv
Authors: M. L. Shcherbatenko, M. S. Elezov, D. V. Sych, G. N. Goltsman
Year
2019
Paper ID
14666
Status
Preprint
Abstract Read
~2 min
Abstract Words
73
Citations
N/A
Abstract
We experimentally demonstrate a quantum receiver based on Kennedy scheme for discrimination between two phase-modulated weak coherent states. The receiver is assembled entirely from the standard fiber-optic elements and operates at the conventional telecom wavelength 1.55 microns. The local oscillator and the signal are transmitted through different optical fibers, and the displaced signal is measured with a high-efficiency superconducting nanowire single-photon detector. We show the discrimination error rate two times below the shot-noise limit.
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- This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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- We experimentally demonstrate a quantum receiver based on Kennedy scheme for discrimination between two phase-modulated weak coherent states.
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