Atmospheric channel characteristics for quantum communication with continuous polarization variables
نویسندگان
چکیده
منابع مشابه
Quantum direct communication with continuous variables
We show how continuous-variable systems can allow the direct communication of messages with an acceptable degree of privacy. This is possible by combining a suitable phasespace encoding of the plain message with real-time checks of the quantum communication channel. The resulting protocol works properly when a small amount of noise affects the quantum channel. If this noise is non-tolerable, th...
متن کاملQuantum Cloning with Continuous Variables
Quantum information theory has developed dramatically over the past decade, driven by the prospects of quantum-enhanced communication and computation systems. Among the most striking successes, one finds for example the discovery of quantum factoring, quantum key distribution, or quantum teleportation. Most of these concepts were initially developed for discrete quantum variables, in particular...
متن کاملQuantum information with continuous variables
Quantum information is a rapidly advancing area of interdisciplinary research. It may lead to real-world applications for communication and computation unavailable without the exploitation of quantum properties such as nonorthogonality or entanglement. This article reviews the progress in quantum information based on continuous quantum variables, with emphasis on quantum optical implementations...
متن کاملQuantum Teleportation with Continuous Variables: a survey
Very recently we have witnessed a new development of quantum information, the so-called continuous variable (CV) quantum information theory. Such a further development has been mainly due to the experimental and theoretical advantages offered by CV systems, i.e., quantum systems described by a set of observables, like position and momentum, which have a continuous spectrum of eigenvalues. Accor...
متن کاملCloning and Cryptography with Quantum Continuous Variables⋆
The cloning of quantum variables with continuous spectra is investigated. We define a Gaussian 1-to-2 cloning machine, which copies equally well two conjugate variables such as position and momentum or the two quadrature components of a light mode. The resulting cloning fidelity for coherent states, namely F = 2/3, is shown to be optimal. An asymmetric version of this Gaussian cloner is then us...
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: Applied Physics B
سال: 2009
ISSN: 0946-2171,1432-0649
DOI: 10.1007/s00340-009-3838-8