3 papers
nlin.AO2020
Amplitude chimera and chimera death induced by external dynamical agents
Umesh Kumar Verma, G. Ambika
We report the emergence of stable amplitude chimeras and chimera death in a two-layer network where one layer has an ensemble of identical nonlinear oscillators interacting directl…
nlin.CD2019
Advent of Extreme Events in Predator Populations
Sudhanshu Shekhar Chaurasia, Umesh Kumar Verma, Sudeshna Sinha
We study the dynamics of a ring of patches with vegetation-prey-predator populations, coupled through interactions of the Lotka-Volterra type. We find that the system yields aperio…
nlin.AO2019
Explosive death in nonlinear oscillators coupled by quorum sensing
Umesh Kumar Verma, Sudhanshu Shekhar Chaurasia, Sudeshna Sinha
Many biological and chemical systems exhibit collective behavior in response to the change in their population density. These elements or cells communicate with each other via dyna…