Effervescence in a binary mixture with nonlinear non-reciprocal interactions
Effervescence in a binary mixture with nonlinear non-reciprocal interactions
- Event time: 3:00pm until 4:00pm
- Event date: 21st May 2024
- Speaker: Dr Suropriya Saha (Max Planck Institute for Dynamics and Self-Organization, Göttingen)
- Location: Online - see email.
Event details
Non-reciprocal interactions between scalar fields that represent the concentrations of two active species are known to break the parity and time-reversal (PT) symmetries of the equilibrium state, as manifested in the emergence of travelling waves. We explore the notion of nonlinear non-reciprocity and consider a model in which the non-reciprocal interactions can depend on the local values of the scalar fields. For generic cases where such couplings exist, we observe the emergence of spatiotemporal chaos in the steady-state. We associate this chaotic behaviour with a local restoration of PT symmetry in fluctuating spatial domains, which leads to the coexistence of oscillating densities and phase-separated droplets that are spontaneously created and annihilated. We uncover that this phenomenon, which we denote as effervescence, can exist as a dynamical steady-state in large parts of the parameter space in two different incarnations, as characterized by the presence or absence of an accompanying travelling wave.
Event resources
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