A passive transmitter for quantum key distribution with coherent light
نویسندگان
چکیده
Marcos Curty, Marc Jofre, Valerio Pruneri, and Morgan W. Mitchell 1 Escuela de Ingenieŕıa de Telecomunicación, Department of Signal Theory and Communications, University of Vigo, Campus Universitario, 36310 Vigo, Pontevedra, Spain 2 ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain 3 ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain (Dated: August 4, 2011)
منابع مشابه
Passive preparation of BB84 signal states with coherent light
In a typical optical implementation of the Bennett-Brassard 1984 (so-called BB84) quantum key distribution protocol, the sender uses an active source to produce the required signal states. While active state preparation of BB84 signals is a simple and elegant solution in principle, in practice passive state preparation might be desirable in some scenarios, for instance, in those experimental se...
متن کاملPassive Decoy State Quantum Key Distribution
The use of decoy states enhances the performance of practical quantum key distribution systems significantly by monitoring the quantum channel in a more detailed way. While active modulation of the intensity of the pulses is an effective way of preparing decoy states in principle, in practice passive preparation might be desirable in some scenarios. Known passive methods involve parametric down...
متن کاملQuantum cryptography in free space with coherent-state light
In this paper, we present a proof-of-concept experimental demonstration of the secret key quantum cryptographic scheme. A tabletop communication link was set up in the free-space channel using ordinary lasers as transmitters, which emit coherent states of light, and quantumlimited direct detection was employed in the receivers. In the secret key scheme, one needs a supply of M possible quantum ...
متن کاملRealizing the measure-device-independent quantum-key-distribution with passive heralded-single photon sources
In this paper, we put forward a new approach towards realizing measurement-device-independent quantum key distribution with passive heralded single-photon sources. In this approach, both Alice and Bob prepare the parametric down-conversion source, where the heralding photons are labeled according to different types of clicks from the local detectors, and the heralded ones can correspondingly be...
متن کاملA high-speed multi-protocol quantum key distribution transmitter based on a dual-drive modulator.
We propose a novel source based on a dual-drive modulator that is adaptable and allows Alice to choose between various practical quantum key distribution (QKD) protocols depending on what receiver she is communicating with. Experimental results show that the proposed transmitter is suitable for implementation of the Bennett and Brassard 1984 (BB84), coherent one-way (COW) and differential phase...
متن کامل