Contractivity of Transport Distances for the Kinetic Kuramoto Equation

• Published in: Journal of statistical physics Vol. 156; no. 2; pp. 395 - 415
• Main Authors: Carrillo, José A., Choi, Young-Pil, Ha, Seung-Yeal, Kang, Moon-Jin, Kim, Yongduck
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.07.2014; Springer
• Subjects: Mathematical and Computational Physics; Physical Chemistry; Physics; Physics and Astronomy; Quantum Physics; Statistical Physics and Dynamical Systems; Theoretical; Complete synchronization; Kuramoto model; 92D25; 74A25; Wasserstein distance; Contraction; 76N10
• ISSN: 0022-4715; 1572-9613
• DOI: 10.1007/s10955-014-1005-z

We present synchronization and contractivity estimates for the kinetic Kuramoto model obtained from the Kuramoto phase model in the mean-field limit. For identical Kuramoto oscillators, we present an admissible class of initial data leading to time-asymptotic complete synchronization, that is, all measure valued solutions converge to the traveling Dirac measure concentrated on the initial averaged phase. In the case of non-identical oscillators, we show that the velocity field converges to the average natural frequency proving that the oscillators move asymptotically with the same frequency under suitable assumptions on the initial configuration. If two initial Radon measures have the same natural frequency density function and strength of coupling, we show that the Wasserstein p -distance between corresponding measure valued solutions is exponentially decreasing in time. This contraction principle is more general than previous L 1 -contraction properties of the Kuramoto phase model.