Projects per year
Abstract
Any practical experiment utilizing the innate Ddimensional entanglement of the orbital angular momentum (OAM) of photons is subject to the generation capacity of the entangled photon source and the modal capacity of the detection system. We report an experimental spontaneous parametricdownconversion system able to generate and detect tunable highdimensional OAM entanglement. By tuning the phase matching, we demonstrate a factor of 2 increase on the halfwidth of the OAMcorrelation spectrum, from 10 to 20. In terms of quantum mutual information capacity, this is an increase from 3.18 to 4.95 bits/photon. Furthermore, we measure correlations in the conjugate variable, angular position, and obtain concurrence values 0.96 and 0.90. The good entanglement measures in both OAM and angular position bases indicate bipartite, Ddimensional entanglement where D is tunable.
Original language  English 

Article number  012334 
Number of pages  6 
Journal  Physical Review A 
Volume  86 
Issue number  1 
DOIs  
Publication status  Published  27 Jul 2012 
Keywords
 dimension
 highdimensional
 twophoton
 orbital angular
 momentum entaglement
Projects
 3 Finished

Challenges in Orbital Angular Momentum
Barnett, S.
EPSRC (Engineering and Physical Sciences Research Council)
1/01/11 → 30/11/14
Project: Research

Fullfield Coherent Quantum Imaging
Barnett, S.
EPSRC (Engineering and Physical Sciences Research Council)
1/04/08 → 31/05/12
Project: Research
