"Interaction--free'' interaction: entangling evolution via quantum Zeno   effect
  The effect of entangling evolution induced by frequently repeated quantum measurement is presented. The interesting possibility of conditional freezing the system in maximally entangled state out of Zeno effect regime is also revealed. The illustration of the phenomena in terms of dynamical version of ``interaction free'' measurement is presented. Some general conclusions are provided. 
Pawe{\l} Horodecki