Anindya Banerji, Ravindra P. Singh, Abir Bandyopadhyay
We discuss the non classicality of a class of vortex states which are engineered by photon substraction from two mode squeezed vacuum. We calculate the log negativity parameter, the von Neumann entropy of the reduced density matrix and the concurrence. The negativity of the Wigner function is discussed as a measure of the non classicality and the quantum interference pattern obtained therein as a possible measure of the entanglement present between the two modes and compared with the results obtained from concurrence.
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http://arxiv.org/abs/1304.2887
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