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Entanglement Measure of the Planar-Transverse Classical Light Field
New Phys.: Sae Mulli 2019; 69: 97~100
Published online January 31, 2019;
© 2019 New Physics: Sae Mulli.

Sun-Hyun YOUN*

Department of Physics, Chonnam National University, Gwangju 61186, Korea
Correspondence to:
Received August 23, 2018; Revised September 24, 2018; Accepted October 10, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Classical light fields are considered physical examples of nonquantum entanglement [Qian and Eberly, Opt. Lett. 36, 4110 (2011)]. We apply concurrence and the Schmidt approach to evaluate the degree of entanglement for a generalized polarization state that Qian and Eberly suggested, and we obtained an analytic form of the general entanglement state for planar polarization states of classical light. Calalculating the concurrence and the Schmidt value for the usual polarization states in two-dimensional lab space, we found a maximum entanglement state for the two-dimensional lab space unit vectors (${\vec x}$ and the ${\vec y}$) and two-dimensional statistical function space unit vectors ($E_x$ and $E_y$). 
PACS numbers: 42.25.-p, 03.65.-w, 42.50.Lc
Keywords: Concurrence, Schmidt value, Entanglement

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