Coherent state quantum key distribution with multi letter phase-shift keying
نویسندگان
چکیده
منابع مشابه
Quantum Key Distribution with Multi Letter Phase-Shift Keying
We present a new protocol for quantum key distribution using discrete phase-shift encoding with continuous variables. The novelty of the protocol is multi letter alphabets represented by coherent states of light with fixed amplitude and variable phase. Information is encoded in the phase of a coherent states which can be chosen from a regular discrete set consisting of an arbitrary number of le...
متن کاملDifferential-phase-shift quantum key distribution using coherent light
Differential-phase-shift quantum key distribution based on two nonorthogonal states is described. A weak coherent pulse train is sent from Alice to Bob, in which the phase of each pulse is randomly modulated by $0,p%. Bob measures the differential phase by a one-bit delay circuit. The system has a simple configuration without the need for an interferometer and a bright reference pulse in Alice’...
متن کاملDifferential Phase Shift Quantum Key Distribution
A novel quantum cryptography scheme is proposed, in which a single photon is prepared in a linear superposition state of three basis kets. A photon split to three pulses is sent from Alice to Bob, where the phase difference between sequential two pulses carries bit information. Bob measures the phase difference by passive differential phase detection. This scheme is suitable for fiber transmiss...
متن کاملSequential attacks against differential-phase-shift quantum key distribution with weak coherent states
Marcos Curty, Lucy-Liuxuan Zhang, Hoi-Kwong Lo, and Norbert Lütkenhaus 1 Center for Quantum Information and Quantum Control, Department of Physics and Department of Electrical & Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada 2 Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada 3 Quantum Information Theory Group, Institut f...
متن کاملEntangled-coherent-state quantum key distribution with entanglement witnessing
David S. Simon,1,2 Gregg Jaeger,2,3 and Alexander V. Sergienko2,4,5 1Department of Physics and Astronomy, Stonehill College, 320 Washington Street, Easton, Massachusetts 02357, USA 2Department of Electrical and Computer Engineering, Boston University, 8 Saint Mary’s Street, Boston, Massachusetts 02215, USA 3Division of Natural Sciences and Mathematics, Boston University, Boston, Massachusetts 0...
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: 2010
ISSN: 1367-2630
DOI: 10.1088/1367-2630/12/5/053019