TY  - JOUR
A1  - Vlasov, Vladimir
A1  - Pikovskij, Arkadij
A1  - Macau, Elbert E. N.
T1  - Star-type oscillatory networks with generic Kuramoto-type coupling: A model for "Japanese drums synchrony"
JF  - Chaos : an interdisciplinary journal of nonlinear science
N2  - We analyze star-type networks of phase oscillators by virtue of two methods. For identical oscillators we adopt the Watanabe-Strogatz approach, which gives full analytical description of states, rotating with constant frequency. For nonidentical oscillators, such states can be obtained by virtue of the self-consistent approach in a parametric form. In this case stability analysis cannot be performed, however with the help of direct numerical simulations we show which solutions are stable and which not. We consider this system as a model for a drum orchestra, where we assume that the drummers follow the signal of the leader without listening to each other and the coupling parameters are determined by a geometrical organization of the orchestra. (C) 2015 AIP Publishing LLC.
Y1  - 2015
U6  - https://doi.org/10.1063/1.4938400
SN  - 1054-1500
SN  - 1089-7682
VL  - 25
IS  - 12
PB  - American Institute of Physics
CY  - Melville
ER  - 
TY  - JOUR
A1  - Vlasov, Vladimir
A1  - Komarov, Maxim
A1  - Pikovskij, Arkadij
T1  - Synchronization transitions in ensembles of noisy oscillators with bi-harmonic coupling
JF  - Journal of physics : A, Mathematical and theoretical
N2  - We describe synchronization transitions in an ensemble of globally coupled phase oscillators with a bi-harmonic coupling function, and two sources of disorder-diversity of the intrinsic oscillators' frequencies, and external independent noise forces. Based on the self-consistent formulation, we derive analytic solutions for different synchronous states. We report on various non-trivial transitions from incoherence to synchrony, with the following possible scenarios: simple supercritical transition (similar to classical Kuramoto model); subcritical transition with large area of bistability of incoherent and synchronous solutions; appearance of a symmetric two-cluster solution which can coexist with the regular synchronous state. We show that the interplay between relatively small white noise and finite-size fluctuations can lead to metastability of the asynchronous solution.
KW  - synchronization
KW  - bi-harmonic coupling
KW  - noise
Y1  - 2015
U6  - https://doi.org/10.1088/1751-8113/48/10/105101
SN  - 1751-8113
SN  - 1751-8121
VL  - 48
IS  - 10
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -