Chaotic saddles and interior crises in a dissipative nontwist system
Journal Article
·
· Physical Review. E
- Sao Paulo State University (UNESP) (Brazil); OSTI
- Sao Paulo State University (UNESP) (Brazil)
- Univ. of Sao Paulo (Brazil)
- Univ. of Sao Paulo (Brazil); Federal University of Parana, Curitiba (Brazil)
- Univ. of Texas, Austin, TX (United States)
Here, we consider a dissipative version of the standard nontwist map. Nontwist systems present a robust transport barrier, called the shearless curve, that becomes the shearless attractor when dissipation is introduced. This attractor can be regular or chaotic depending on the control parameters. Chaotic attractors can undergo sudden and qualitative changes as a parameter is varied. These changes are called crises, and at an interior crisis the attractor suddenly expands. Chaotic saddles are nonattracting chaotic sets that play a fundamental role in the dynamics of nonlinear systems; they are responsible for chaotic transients, fractal basin boundaries, and chaotic scattering, and they mediate interior crises. In this work we discuss the creation of chaotic saddles in a dissipative nontwist system and the interior crises they generate. We show how the presence of two saddles increases the transient times and we analyze the phenomenon of crisis induced intermittency.
- Research Organization:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Organization:
- Coordination for the Improvement of Higher Education Personnel (CAPES); National Council for Scientific and Technological Development (CNPq); São Paulo Research Foundation (FAPESP); USDOE
- Grant/Contract Number:
- FG05-80ET53088
- OSTI ID:
- 2417854
- Journal Information:
- Physical Review. E, Journal Name: Physical Review. E Journal Issue: 2 Vol. 107; ISSN 2470-0045
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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