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.
© 2011 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: August 24, 2011
Revised Manuscript: September 23, 2011
Manuscript Accepted: September 26, 2011
Published: October 14, 2011
Xiao-Feng Qian and J. H. Eberly, "Entanglement and classical polarization states," Opt. Lett. 36, 4110-4112 (2011)