Quantum key distribution over 30km of standard fiber using energy-time entangled photon pairs: a comparison of two chromatic dispersion reduction methods

Abstract

We present a full implementation of a quantum key distribution system using energy-time entangled photon pairs and functioning with a 30km standard telecom fiber quantum channel. Two bases of two orthogonal states are implemented and the setup is quite robust to environmental constraints such as temperature variation. Two different ways to manage chromatic dispersion in the quantum channel are discussed.

10 pages, 4 figures

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• Security bound of two-bases quantum key-distribution protocols using qudits
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• On the implementation of a deterministic secure coding protocol using polarization entangled photons
• Performance of various quantum key distribution systems using 1.55 um up-conversion single-photon detectors
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• Experimentally optimizing QKD rates via nonlocal dispersion compensation
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• Asymmetric node placement in fiber-based quantum networks
• Manipulating time-bin qubits with fiber optics components
• Quantum Metamaterials: Applications in quantum information science