Picture of scraped petri dish

Scrape below the surface of Strathprints...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Explore world class Open Access research by researchers at Strathclyde, a leading technological university.

Explore

Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces

Jack, B. and Yao, A. M. and Leach, J. and Romero, J. and Franke-Arnold, S. and Ireland, D. G. and Barnett, S. M. and Padgett, M. J. (2010) Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces. Physical Review A, 81 (4). ISSN 1094-1622

[img]
Preview
PDF
EntangArbSup.pdf - Draft Version

Download (528kB) | Preview

Abstract

We use spatial light modulators (SLMs) to measure correlations between arbitrary superpositions of orbital angular momentum (OAM) states generated by spontaneous parametric down-conversion. Our technique allows us to fully access a two-dimensional OAM subspace described by a Bloch sphere, within the higher-dimensional OAM Hilbert space. We quantify the entanglement through violations of a Bell-type inequality for pairs of modal superpositions that lie on equatorial, polar, and arbitrary great circles of the Bloch sphere. Our work shows that SLMs can be used to measure arbitrary spatial states with a fidelity sufficient for appropriate quantum information processing systems.