Dynamical behavior of RF-biased Josephson junctions (II)

Numerical investigations of a differential equation describing an RF-biased Josephson junction, in which the interference term current is included, are carried out in some parameter region. The existence of the intermittent transition to chaos is obtained and the critical exponent of the scaling law is determined in agreement with theoretical predictions. Furthermore, the Lyapunov exponent is calculated for several parameters. Then the fractal dimension of strange attractor d/sub L/ is obtained; its dependence on the Lyapunov exponent is defined by Kaplan and Yorke. In addition, the Kolmogorov capacity of strange attractor d/sub c/ is also calculated by bin-counting algorithm. Such calculated values of d/sub L/ and d/sub c/ are close to each other as expected