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DY: Fachverband Dynamik und Statistische Physik

DY 18: Critical Phenomena and Phase Transitions

DY 18.5: Vortrag

Montag, 12. März 2018, 16:30–16:45, BH-N 333

Emergence of bistability in coupled spreading dynamics — •Fakhteh Ghanbarnejad — Institute of Theoretical Physics, Technical University of Berlin

In this work, we study different coupled spreading dynamics in an evolutionary ecological framework. Spreading of pathogens, fashions, ideas, products and so on are examples of such dynamical systems. These spreading phenomena are often coupled with each other in different ways: either to strengthen or weaken each other propagation. The coupling may lead to "nucleation" and as a consequence first order phase transitions at epidemic thresholds. Also it may lead to bi-stability in a wide regime of parameters [New J. Phys. 19, 103041(2017)]. Here we present examples of such scenarios from epidemiological modelling in mean filed approximations as well as simulations results on random generated networks. We also discuss which mechanisms may cause abrupt transitions in different time scales of the system [Frontiers in Physics, V 5, P 46 (2017)].