Quasideterministic generation of maximally entangled states of two   mesoscopic atomic ensembles by adiabatic quantum feedback
  We introduce an efficient, quasideterministic scheme to generate maximally entangled states of two atomic ensembles. The scheme is based on quantum nondemolition measurements of total atomic populations and on adiabatic quantum feedback conditioned by the measurements outputs. The high efficiency of the scheme is tested and confirmed numerically for ideal photodetection as well as in the presence of losses. 
Antonio Di Lisi, Silvio De Siena, Fabrizio Illuminati, and David   Vitali