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Title: Controlling excess noise in fiber-optics continuous-variable quantum key distribution

Abstract

We describe a continuous-variable coherent-states quantum-key distribution system working at 1550 nm, and entirely made of standard fiber optics and telecommunications components, such as integrated-optics modulators, couplers and fast InGaAs photodiodes. The setup is composed of an emitter randomly modulating a coherent state in the complex plane with a doubly Gaussian distribution, and a receiver based on a shot-noise limited time-resolved homodyne detector. By using a reverse reconciliation protocol, the device can transfer a raw key rate up to 1 Mbit/s, with a proven security against Gaussian or non-Gaussian attacks. The dependence of the secret information rate of the present fiber setup is studied as a function of the line transmission and excess noise.

Authors:
 [1];  [2];  [1]; ;  [3]
  1. Thales Research and Technologies, RD 128 91767 Palaiseau CEDEX (France)
  2. (France)
  3. Laboratoire Charles Fabry de l'Institut d'Optique, Campus Universitaire, Batiment 503 91403 Orsay CEDEX (France)
Publication Date:
OSTI Identifier:
20786417
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 72; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.72.050303; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANNIHILATION OPERATORS; DATA TRANSMISSION; DISTRIBUTION; EIGENSTATES; FIBER OPTICS; GAUSS FUNCTION; INFORMATION THEORY; NOISE; OPTICAL FIBERS; PHOTODIODES; QUANTUM CRYPTOGRAPHY; SECRECY PROTECTION; TIME RESOLUTION

Citation Formats

Lodewyck, Jerome, Laboratoire Charles Fabry de l'Institut d'Optique, Campus Universitaire, Batiment 503 91403 Orsay CEDEX, Debuisschert, Thierry, Tualle-Brouri, Rosa, and Grangier, Philippe. Controlling excess noise in fiber-optics continuous-variable quantum key distribution. United States: N. p., 2005. Web. doi:10.1103/PHYSREVA.72.0.
Lodewyck, Jerome, Laboratoire Charles Fabry de l'Institut d'Optique, Campus Universitaire, Batiment 503 91403 Orsay CEDEX, Debuisschert, Thierry, Tualle-Brouri, Rosa, & Grangier, Philippe. Controlling excess noise in fiber-optics continuous-variable quantum key distribution. United States. doi:10.1103/PHYSREVA.72.0.
Lodewyck, Jerome, Laboratoire Charles Fabry de l'Institut d'Optique, Campus Universitaire, Batiment 503 91403 Orsay CEDEX, Debuisschert, Thierry, Tualle-Brouri, Rosa, and Grangier, Philippe. Tue . "Controlling excess noise in fiber-optics continuous-variable quantum key distribution". United States. doi:10.1103/PHYSREVA.72.0.
@article{osti_20786417,
title = {Controlling excess noise in fiber-optics continuous-variable quantum key distribution},
author = {Lodewyck, Jerome and Laboratoire Charles Fabry de l'Institut d'Optique, Campus Universitaire, Batiment 503 91403 Orsay CEDEX and Debuisschert, Thierry and Tualle-Brouri, Rosa and Grangier, Philippe},
abstractNote = {We describe a continuous-variable coherent-states quantum-key distribution system working at 1550 nm, and entirely made of standard fiber optics and telecommunications components, such as integrated-optics modulators, couplers and fast InGaAs photodiodes. The setup is composed of an emitter randomly modulating a coherent state in the complex plane with a doubly Gaussian distribution, and a receiver based on a shot-noise limited time-resolved homodyne detector. By using a reverse reconciliation protocol, the device can transfer a raw key rate up to 1 Mbit/s, with a proven security against Gaussian or non-Gaussian attacks. The dependence of the secret information rate of the present fiber setup is studied as a function of the line transmission and excess noise.},
doi = {10.1103/PHYSREVA.72.0},
journal = {Physical Review. A},
number = 5,
volume = 72,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2005},
month = {Tue Nov 15 00:00:00 EST 2005}
}