Implementing a non-local xor function with quantum communication

The or-exclusive function (xor) is one of the most important logical functions, and can be used in several protocols and algorithms, as encryption and error correction. This paper discusses several ways to implement the xor function, in a secure way using quantum communication, between users of a ne...

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Bibliographic Details
Published in:Journal of modern optics 2006-08, Vol.53 (12), p.1765-1775
Main Authors: Melo de Sousa, P. B., Rosa Silva, J. B., Ramos, R. V.
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interferometers
Nonclassical field states
squeezed, antibunched and sub-poissonian states
operational definitions of the phase of the field
phase measurements
Optical instruments, equipment and techniques
Optics
Physics
Quantum communication
Quantum information
Quantum optics
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Summary:The or-exclusive function (xor) is one of the most important logical functions, and can be used in several protocols and algorithms, as encryption and error correction. This paper discusses several ways to implement the xor function, in a secure way using quantum communication, between users of a network. It is shown how to implement it using bipartite, tripartite and four-partite maximally entangled states, as well using an optical interferometer and strongly attenuated coherent states. Some protocols for secure communication using the xor, as quantum key distribution, are also proposed.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340600591073