Phase diagram of a generalized Winfree model

Details Phase diagram of a generalized Winfree model Phase diagram of a generalized Winfree model

2008-07-24

arxiv.org/abs/0807.3823v1

Physical Review E 75, 051104 (2007)

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 3 figures

Scientific paper

10.1103/PhysRevE.75.051104

We study the phase diagram of a generalized Winfree model. The modification is such that the coupling depends on the fraction of synchronized oscillators, a situation which has been noted in some experiments on coupled Josephson junctions and mechanical systems. We let the global coupling k be a function of the Kuramoto order parameter r through an exponent z such that z=1 corresponds to the standard Winfree model, z<1 strengthens the coupling at low r (low amount of synchronization) and, at z>1, the coupling is weakened for low r. Using both analytical and numerical approaches, we find that z controls the size of the incoherent phase region, and one may make the incoherent behavior less typical by choosing z<1. We also find that the original Winfree model is a rather special case, indeed the partial locked behavior disappears for z>1. At fixed k and varying gamma, the stability boundary of the locked phase corresponds to a transition that is continuous for z<1 and first-order for z>1. This change in the nature of the transition is in accordance with a previous study on a similarly modified Kuramoto model.

Affiliated with

Also associated with

No associations

Rating

Phase diagram of a generalized Winfree model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phase diagram of a generalized Winfree model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase diagram of a generalized Winfree model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-676412