Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation
نویسندگان
چکیده
منابع مشابه
Polarization recovery and auto-compensation in Quantum Key Distribution network
A Quantum Key Distribution (QKD) network can allow multi-user communication via secure key. Moreover, by actively switching communication nodes, one can achieve high key transmission rate for the selected nodes. However, the polarization properties of different fiber path are different and these properties also randomly drift over time. Therefore, polarization recovery after the switching and a...
متن کاملQuantum key distribution with blind polarization bases.
We propose a new quantum key distribution scheme that uses the blind polarization basis. In our scheme the sender and the receiver share key information by exchanging qubits with arbitrary polarization angles without basis reconciliation. As only random polarizations are transmitted, our protocol is secure even when a key is embedded in a not-so-weak coherent-state pulse. We show its security a...
متن کاملExperimental study of high speed polarization-coding quantum key distribution with sifted-key rates over Mbit/s.
We present a quantitative study of various limitations on quantum cryptographic systems operating with sifted-key rates over Mbit/s. The dead time of silicon APDs not only limits the sifted-key rate but also causes correlation between the neighboring key bits. In addition to the well-known count-rate dependent timing jitter in avalanche photo-diode (APD), the faint laser sources, the vertical c...
متن کاملContinuous-variable quantum key distribution protocols over noisy channels.
A continuous-variable quantum key distribution protocol based on squeezed states and heterodyne detection is introduced and shown to attain higher secret key rates over a noisy line than any other one-way Gaussian protocol. This increased resistance to channel noise can be understood as resulting from purposely adding noise to the signal that is converted into the secret key. This notion of noi...
متن کاملContinuous-Variables Quantum Key Distribution over Standard Telecom Fiber
In this report, a Gaussian-modulated coherent state quantum key distribution (GMCS QKD) system implemented in telecom wavelength is investigated. This is the first experimental demonstration of one-way GMCS QKD over kilometers of standard telecom fiber. We achieved system performance that would result in a secrete key rate of > 10kb/s of a reverse reconciliation protocol under realistic assumpt...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Journal of Physics
سال: 2009
ISSN: 1367-2630
DOI: 10.1088/1367-2630/11/4/045015