title: Entanglement and classical polarization states.
abstract: We identify classical light fields as physical examples of nonquantum entanglement. A natural measure of degree of polarization emerges from this identification, and we discuss its systematic application to any optical field, whether beamlike or not.
authors: Rochester Theory Center and the Department of Physics & Astronomy University of Rochester, Rochester, New York 14627, USA. xfqian@pas.rochester.edu
authors: Xiao-Feng
authors: XF
authors: Qian
authors: J H
authors: JH
authors: Eberly