Hafezi, MohammadLukin, MikhailTaylor, Jacob M2014-06-042013Hafezi, Mohammad, Mikhail D Lukin, and Jacob M Taylor. 2013. “Non-Equilibrium Fractional Quantum Hall State of Light.” New Journal of Physics 15 (6) (June 3): 063001.1367-2630http://nrs.harvard.edu/urn-3:HUL.InstRepos:12241992We investigate the quantum dynamics of systems involving small numbers of strongly interacting photons. Specifically, we develop an efficient method to investigate such systems when they are externally driven with a coherent field. Furthermore, we show how to quantify the many-body quantum state of light via correlation functions. Finally, we apply this method to two strongly interacting cases: the Bose–Hubbard and fractional quantum Hall models, and discuss an implementation of these ideas in atom–photon system.en-USJournal Article2014-06-0410.1088/1367-2630/15/6/063001