title: Nonlinear optical spectroscopy of single, few, and many molecules; nonequilibrium Green's function QED approach.
authors.affiliation: Department of Chemistry, University of California, Irvine, CA 92697.
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Marx
authors.forename: Upendra
authors.initials: U
authors.lastname: Harbola
authors.forename: Shaul
authors.initials: S
authors.lastname: Mukamel