1,679,576 research outputs found
Generation and manipulation of squeezed states of light in optical networks for quantum communication and computation
We analyze a fiber-optic component which could find multiple uses in novel
information-processing systems utilizing squeezed states of light. Our approach
is based on the phenomenon of photon-number squeezing of soliton noise after
the soliton has propagated through a nonlinear optical fiber. Applications of
this component in optical networks for quantum computation and quantum
cryptography are discussed.Comment: 12 pages, 2 figures; submitted to Journal of Optics
Coherence of qubits based on single Ca ions
Two-level ionic systems, where quantum information is encoded in long lived
states (qubits), are discussed extensively for quantum information processing.
We present a collection of measurements which characterize the stability of a
qubit based on the -- transition of single Ca ions
in a linear Paul trap. We find coherence times of 1 ms, discuss the
main technical limitations and outline possible improvements.Comment: Proceedings of "Trapped charged particles and fundamental
interactions" submitted to Journal of Physics B (IoP
Conceptual Model for Communication
A variety of idealized models of communication systems exist, and all may
have something in common. Starting with Shannons communication model and ending
with the OSI model, this paper presents progressively more advanced forms of
modeling of communication systems by tying communication models together based
on the notion of flow. The basic communication process is divided into
different spheres (sources, channels, and destinations), each with its own five
interior stages, receiving, processing, creating, releasing, and transferring
of information. The flow of information is ontologically distinguished from the
flow of physical signals, accordingly, Shannons model, network based OSI
models, and TCP IP are redesigned.Comment: 13 pages IEEE format, International Journal of Computer Science and
Information Security, IJCSIS November 2009, ISSN 1947 5500,
http://sites.google.com/site/ijcsis
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