LMP Seminar: Defect Solutions of the Non-reciprocal Cahn-Hilliard Model: Spirals and Targets

LMP Seminar

  • Datum: 05.12.2023
  • Uhrzeit: 14:00 - 15:30
  • Vortragende(r): Dr. Navdeep Rana
  • Department of Living Matter Physics, MPI-DS, Göttingen
  • Ort: Max-Planck-Institut für Dynamik und Selbstorganisation (MPIDS)
  • Raum: Riemannraum 1.40 & ZOOM Meeting ID: 997 1155 2453 Passcode: 771001
  • Gastgeber: MPIDS / LMP
  • Kontakt: golestanian-office@ds.mpg.de
I will talk about the defect solutions of the Non-reciprocal Cahn-Hilliard model. We find two kinds of defects, spirals with unit magnitude topological charge, and topologically neutral targets. For a given strength of non-reciprocity, spirals and targets with unique asymptotic wavenumber and amplitude are selected. We use large-scale simulations to show that at low non-reciprocity, a quenched disordered state evolves into quasi-stationary spiral networks. With increasing non-reciprocity, we observe defect networks composed primarily of targets and beyond a critical threshold, a disorder-order transition from defect networks to travelling waves emerges. The transition is marked by a sharp rise in the global polar order.

Defect Solutions of the Non-reciprocal Cahn-Hilliard Model: Spirals and Targets, Navdeep Rana and Ramin Golestanian https://arxiv.org/abs/2306.03513
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