Before revision: This paperis on the application of information theory to the analysis of fundamental lower bounds on the maximum deviations in feedback control systems, where the plant  is linear time-invariant while the controller can generically be any causal functions as long as it stabilizes the plant. It is seen in general that the lower bounds are characterized by the unstable poles (or nonminimum-phase zeros) of the plant as well as the conditional entropy of the disturbance.
After revision: This paperis on the application of information theory to the analysis of fundamental lower bounds on the maximum deviations in feedback control systems, where the plant is linear time-invariant , and it is seen in general that the lower bounds are characterized by the unstable poles (or nonminimum-phase zeros) of the plant as well as the conditional entropy of the disturbance.