title: Turing-like instabilities from a limit cycle.
abstract: The Turing instability is a paradigmatic route to pattern formation in reaction-diffusion systems. Following a diffusion-driven instability, homogeneous fixed points can become unstable when subject to external perturbation. As a consequence, the system evolves towards a stationary, nonhomogeneous attractor. Stable patterns can be also obtained via oscillation quenching of an initially synchronous state of diffusively coupled oscillators. In the literature this is known as the oscillation death phenomenon. Here, we show that oscillation death is nothing but a Turing instability for the first return map of the system in its synchronous periodic state. In particular, we obtain a set of approximated closed conditions for identifying the domain in the parameter space that yields the instability. This is a natural generalization of the original Turing relations, to the case where the homogeneous solution of the examined system is a periodic function of time. The obtained framework applies to systems embedded in continuum space, as well as those defined on a networklike support. The predictive ability of the theory is tested numerically, using different reaction schemes.
authors.affiliation: Department of Infectious Disease Epidemiology, Imperial College London, London, W2 1PG, United Kingdom.|Dipartimento di Fisica e Astronomia, Università di Firenze, INFN and CSDC, Via Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy.
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Challenger
authors.affiliation: Dipartimento di Fisica e Scienza della Terra and INFN, Università di Parma, viale G. P. Usberti 7/A 43124, Parma, Italy.
authors.forename: Raffaella
authors.initials: R
authors.lastname: Burioni
authors.affiliation: Dipartimento di Fisica e Astronomia, Università di Firenze, INFN and CSDC, Via Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy.
authors.forename: Duccio
authors.initials: D
authors.lastname: Fanelli
mesh_terms: D003198:Computer Simulation; D004058:Diffusion; D008962:Models, Theoretical; D010507:Periodicity