Nonclassical correlation between light beams in a Jaynes-Cummings-type model system Bogolubov, N. N., Jr. ; Le Kien, Fam ; Shumovsky, A. S. Abstract Publication: EPL (Europhysics Letters) Pub Date: August 1987 DOI: 10.1209/0295-5075/4/3/005 Bibcode: 1987EL......4..281B