Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems
1 SUPA and Department of Physics, University of Strathclyde, G4 0 NG Glasgow, UK
2 School of Physics and Astronomy, SUPA, University of Glasgow, G12 8 QQ Glasgow, UK
Received: 15 December 2011
Published online: 10 July 2012
The measurement of high-dimensional entangled states of orbital angular momentum prepared by spontaneous parametric down-conversion can be considered in two separate stages: a generation stage and a detection stage. Given a certain number of generated modes, the number of measured modes is determined by the measurement apparatus. We derive a simple relationship between the generation and detection parameters and the number of measured entangled modes.
Key words: Topical issue: High Dimensional Quantum Entanglement. Guest editors: Sonja Franke-Arnold, Alessandra Gatti and Nicolas Treps
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012