Семинар НУЛ МУСС: "Emergence of Extreme events in a Quasiperiodic Oscillator"

Приглашаем Вас на очередной онлайн семинар лаборатории НУЛ МУСС 17 февраля, в пятницу, в 14:40.
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Title: Emergence of Extreme events in a Quasiperiodic Oscillator

Speaker: Dr. Premraj Durairaj,Assistant Professor, Center for Nonlinear Systems, Chennai Institute of Technology, Chennai, India

Extreme events are unusual and rare large-amplitude fluctuations that occur can unexpectedly in nonlinear dynamical systems. Events above the extreme event threshold of the probability distribution of a nonlinear process characterize extreme events. Different mechanisms for the generation of extreme events and their prediction measures have been reported in the literature.  Based on the properties of extreme events, such as rare in the frequency of occurrence and extreme in amplitude, various studies have shown that extreme events are both linear and nonlinear in nature. Interestingly, in this work, we report on a special class of extreme events which are nonchaotic and nonperiodic. These nonchaotic extreme events appear in between the quasi-periodic and chaotic dynamics of the system. We report the existence of such extreme events with various statistical measures and characterization techniques.

References:
1.     Premraj Durairaj, Sathiyadevi Kanagaraj, Suresh Kumarasamy, and Karthikeyan Rajagopal, “Emergence of extreme events in a quasiperiodic oscillator”, Phys. Rev. E, (2023).
2.     Premraj Durairaj, Suresh, K., Pawar, S. A., Kabiraj, L., Prasad, A., & Sujith, R. I.  Dragon-king extreme events as precursors for catastrophic transition. Europhysics Letters, 134(3), 34006, (2021).
3.     Chowdhury SN, Ray A, Dana SK, Ghosh D. Extreme events in dynamical systems and random walkers: a review. Phys Rep. 966:1–52 (2022) .
4.     Seneviratne S, Nicholls N, Easterling D, Goodess C, Kanae S, Kossin J, et al. Changes in Climate Extremes and Their Impacts on the Natural Physical Environment. (2012).