Skip to Main Content
Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

Robustness in the instability of the incoherent state for the Kuramoto-Sakaguchi-Fokker-Planck equation with frustration


Authors: Seung-Yeal Ha, Jaeseung Lee and Yinglong Zhang
Journal: Quart. Appl. Math. 77 (2019), 631-654
MSC (2010): Primary 35B35, 35B40
DOI: https://doi.org/10.1090/qam/1533
Published electronically: January 25, 2019
MathSciNet review: 3962586
Full-text PDF

Abstract | References | Similar Articles | Additional Information

Abstract: We study the robustness in the nonlinear instability of the incoherent state for the Kuramoto-Sakaguchi-Fokker-Planck (KS-FP for short) equation in the presence of frustrations. For this, we construct a new unstable mode for the corresponding linear part of the perturbation around the incoherent state, and we show that the nonlinear perturbation stays close to the unstable mode in some small time interval which depends on the initial size of the perturbations. Our instability results improve the previous results on the KS-FP with zero frustration [J. Stat. Phys. 160 (2015), pp. 477–496] by providing a new linear unstable mode and detailed energy estimates.


References [Enhancements On Off] (What's this?)

References

Similar Articles

Retrieve articles in Quarterly of Applied Mathematics with MSC (2010): 35B35, 35B40

Retrieve articles in all journals with MSC (2010): 35B35, 35B40


Additional Information

Seung-Yeal Ha
Affiliation: Department of Mathematical Sciences and Research Institute of Mathematics, Seoul National University, Seoul 08826, Korea; and Korea Institute for Advanced Study, Hoegiro 87, Seoul 02455, Korea
MR Author ID: 684438
Email: syha@snu.ac.kr

Jaeseung Lee
Affiliation: The Research Institute of Basic Sciences, Seoul National University, Seoul 08826, Korea
MR Author ID: 1201866
Email: jaeseunglee@snu.ac.kr

Yinglong Zhang
Affiliation: Department of Mathematical Sciences, Industrial and Mathematical Data Analytics Research Center, Seoul National University, Seoul 08826, Korea
MR Author ID: 1122209
Email: yinglongzhang@amss.ac.cn

Keywords: Frustration, Kuramoto-Sakaguchi-Fokker-Planck equation, mean-field equation, nonlinear instability
Received by editor(s): July 25, 2018
Published electronically: January 25, 2019
Additional Notes: The work of the first and third authors was supported by the National Research Foundation of Korea(NRF) Grant funded by the Korean Government(MSIT)(No.2017R1A5A1015626)
Article copyright: © Copyright 2019 Brown University