Unambiguous state discrimination in high dimensions

Franke-Arnold, S. and Jeffers, J. (2012) Unambiguous state discrimination in high dimensions. European Physical Journal D, 66(7), p. 196. (doi:10.1140/epjd/e2012-30027-3)

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Publisher's URL: http://dx.doi.org/10.1140/epjd/e2012-30027-3

Abstract

We propose methods for the unambiguous discrimination of quantum states encoded in the spatial profile of light modes, in particular in the orbital angular momentum of light. Perfect discrimination between quantum states is possible only between orthogonal states of a known basis system. Generalised measurement strategies have been developed for the distinction between non-orthogonal states in a two-dimensional state space, e.g. the polarisation of light. Here we consider information encoded in superpositions of orbital angular momentum states of light, defined within an infinite-dimensional state space. Generalised measurements will be an important addition to quantum communication in high-dimensional spaces.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Franke-Arnold, Dr Sonja
Authors: Franke-Arnold, S., and Jeffers, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:European Physical Journal D
ISSN:1434-6060
ISSN (Online):1434-6079

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