  Extended Josephson junction driven by dc bias current is studied numerically.
Two types of solutions, symmetrical and asymmetrical, are found. The
current-voltage characteristic (IVC) is calculated. The symmetrical solutions
form main histeretic IVC and asymmetrical one create an additional branch.
Depending on the bias current value periodic, quasiperiodic and chaotic modes
of the junction motion was observed. Dynamics of the junction affected by
thermal fluctuations was analyzed. Stability of different states of the
junction is discussed.
