Chaos control in photoconductors
  Chaos synchronization in one of charge-carrier dynamical systems in photoconductors is studied within both the replica and nonreplica approaches.It has been shown that using the boundedness of the solutions of the dynamical systems, nonreplica approach to chaos synchronization and Routh-Hurwitz criteria, it is possible to make negative all the conditional Lyapunov exponents without complex numerical and analytical calculations. 
Shahverdiev E.M