Scattering of coherent states on a single artificial atom
  In this work we theoretically analyze a circuit QED design where propagating quantum microwaves interact with a single artificial atom, a single Cooper pair box. In particular, we derive a master equation in the so-called transmon regime, including coherent drives. Inspired by recent experiments, we then apply the master equation to describe the dynamics in both a two-level and a three-level approximation of the atom. In the two-level case, we also discuss how to measure photon antibunching in the reflected field and how it is affected by finite temperature and finite detection bandwidth. 
B. Peropadre, J. Lindkvist, I.-C. Hoi, C.M. Wilson, J.J.   Garcia-Ripoll, P. Delsing, G. Johansson
quant-ph