Department of Physics, Saratov State University
Head of Radiophysics and Nonlinear Dynamics Chair, Saratov State University, Russia
Born: October 21, 1943
1961-1966: student of Saratov State University, Russia.
1968-1970: Post-graduate (Ph.D.) student, Saratov State University, Russia
1968-1970: Post-graduate student, State University, Saratov, Russia
1970-1987: Assistent, First teacher, Associate professor,State University, Saratov, Russia
1987-1987: Professor, Humboldt University, Berlin
1987-1988: Professor, State University, Saratov, Russia
Since 1988: Head of Radiophysics and Nonlinear Dynamics Chair, State University, Saratov, Russia
1970: Ph.D., Saratov State University, Russia
1987: Doctor of Sciences, Saratov State University, Russia
1989: Professor of Radiophysics and Nonlinear Dynamics Chair, Saratov State University, Russia
1994: Scientific Grant of the President of Russia and Russian Academy of Sciences
1994: Soros Professor
1995: Honored Man of Science of Russia
1995: Corresponding Member of International Academy of Informatization (OON)
1997: Corresponding Member of Russian Academy of Natural Sciences
Bukh A. V., Slepnev A. V., Anishchenko V. S., Vadivasova T. E.
Stability and Noise-induced Transitions in an Ensemble of Nonlocally Coupled Chaotic Maps
2018, vol. 23, no. 3, pp. 325-338
The influence of noise on chimera states arising in ensembles of nonlocally coupled chaotic maps is studied. There are two types of chimera structures that can be obtained in such ensembles: phase and amplitude chimera states. In this work, a series of numerical experiments is carried out to uncover the impact of noise on both types of chimeras. The noise influence on a chimera state in the regime of periodic dynamics results in the transition to chaotic dynamics. At the same time, the transformation of incoherence clusters of the phase chimera to incoherence clusters of the amplitude chimera occurs. Moreover, it is established that the noise impact may result in the appearance of a cluster with incoherent behavior in the middle of a coherence cluster.
Semenova N. I., Rybalova E. V., Strelkova G. I., Anishchenko V. S.
“Coherence–incoherence” Transition in Ensembles of Nonlocally Coupled Chaotic Oscillators with Nonhyperbolic and Hyperbolic Attractors
2017, vol. 22, no. 2, pp. 148-162
We consider in detail similarities and differences of the “coherence–incoherence” transition in ensembles of nonlocally coupled chaotic discrete-time systems with nonhyperbolic and hyperbolic attractors. As basic models we employ the Hénon map and the Lozi map. We show that phase and amplitude chimera states appear in a ring of coupled Hénon maps, while no chimeras are observed in an ensemble of coupled Lozi maps. In the latter, the transition to spatio-temporal chaos occurs via solitary states. We present numerical results for the coupling function which describes the impact of neighboring oscillators on each partial element of an ensemble with nonlocal coupling. Varying the coupling strength we analyze the evolution of the coupling function and discuss in detail its role in the “coherence–incoherence” transition in the ensembles of Hénon and Lozi maps.
Anishchenko V. S., Astakhov S. V., Vadivasova T. E.
Diagnostics of the degree of noise influence on a nonlinear system using relative metric entropy
2010, vol. 15, no. 2-3, pp. 261-273
In this paper we summarize and substantiate the relative metric entropy approach introduced in our previous papers [1,2]. Using this approach we study the mixing influence of noise on both regular and chaotic systems. We show that the synchronization phenomenon as well as stochastic resonance decrease, the degree of mixing is caused by white Gaussian noise.