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Observation of entanglement witnesses for orbital angular momentum states
2012
European Physical Journal D : Atomic, Molecular and Optical Physics
Entanglement witnesses provide an efficient means of determining the level of entanglement of a system using the minimum number of measurements. Here we demonstrate the observation of twodimensional entanglement witnesses in the high-dimensional basis of orbital angular momentum (OAM). In this case, the number of potentially entangled subspaces scales as d(d − 1)/2, where d is the dimension of the space. The choice of OAM as a basis is relevant as each subspace is not necessarily maximally
doi:10.1140/epjd/e2012-30057-9
fatcat:2bi2ynxserbvplenh6xxb5eea4