Phase reset of complex oscillations by a~pulsed action

The effect of phase reset in a~complex oscillatory system under the action of an external pulse is investigated. After the pulse action, the phase of oscillations in the system acquires a~new value, which is virtually independent of the initial phase and is only determined by the pulse parameters (the amplitude and the duration). The phase reset is observed for pulses of different durations, including those considerably shorter than the characteristic scale of oscillations in the system. The effect occurs without any fundamental difference for the cases of regular and chaotic oscillations.