All-optical non-Markovian stroboscopic quantum simulator
  An all-optical scheme for simulating non-Markovian evolution of a quantum system is proposed. It uses only linear optics elements and by controlling the system parameters allows one to control the presence or absence of information backflow from the environment. A sufficient and necessary condition for the non-Markovianity of our channel based on Gaussian inputs is proved. Various criteria for detecting non-Markovianity are also investigated by checking the dynamical evolution of the channel. 
Jiasen Jin, Vittorio Giovannetti, Rosario Fazio, Fabio Sciarrino,   Paolo Mataloni, Andrea Crespi, and Roberto Osellame
quant-ph physics.optics