Controlling excess noise in fiber-optics continuous-variable quantum key distribution
نویسندگان
چکیده
منابع مشابه
Long-distance continuous-variable quantum key distribution by controlling excess noise
Quantum cryptography founded on the laws of physics could revolutionize the way in which communication information is protected. Significant progresses in long-distance quantum key distribution based on discrete variables have led to the secure quantum communication in real-world conditions being available. However, the alternative approach implemented with continuous variables has not yet reac...
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We experimentally study the depolarized guided acoustic wave Brillouin scattering in a long-distance telecom single-mode fiber (SMF-28e). It is shown that such a scattering process can introduce excess noise and further degrade the performance of the fiber-based continuous variable quantum key distribution (CVQKD) system where a fiber is utilized as the quantum channel. Based on the experimenta...
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Most continuous-variable quantum key distribution schemes are based on the Gaussian modulation of coherent states followed by continuous quadrature detection using homodyne detectors. In all previous schemes, the Gaussian modulation has been carried out in conjugate quadratures thus requiring two independent modulators for their implementations. Here, we propose and experimentally test a largel...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2005
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.72.050303