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.
After revision: In this paper, we examine the fundamental performance limitations in the control of stochastic dynamical systems; more specifically, we derive generic \mathcal{L where the plant is linear time-invariant while the controller can generically be any causal functions as long as it stabilizes the plant.