COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |

University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Liquid crystals, topological defects, and morphogenesis

## Liquid crystals, topological defects, and morphogenesisAdd to your list(s) Download to your calendar using vCal - Farzan Vafa (Harvard University)
- Thursday 31 August 2023, 15:00-16:00
- Discussion Room, Newton Institute.
If you have a question about this talk, please contact nobody. SPL - New statistical physics in living matter: non equilibrium states under adaptive control We begin by investigating the ground-state configurations of two-dimensional liquid crystals with p-fold rotational symmetry (p-atics) on cones. We show that the cone apex develops an effective topological charge, which in analogy to electrostatics, leads to defect absorption and emission at the cone apex as the deficit angle of the cone is varied. We then apply this formalism to develop a minimal model of morphogenesis of a surface where the dynamics of the intrinsic geometry is diffusive growth sourced by topological defects. We show that a positive (negative) defect can dynamically generate a cone (hyperbolic cone). We analytically explain features of the growth profile as a function of position and time, and predict that in the presence of a positive defect, a bump forms with height profile h(t) ~ t^(1/2) for early times t. To incorporate the effect of the mean curvature, we exploit the fact that for axisymmetric surfaces, the extrinsic geometry can be deduced entirely by the intrinsic geometry. We find that the resulting stationary geometry, for polar order and small bending modulus, is a deformed football. We apply our framework to the simple animal Hydra. This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
- Discussion Room, Newton Institute
- Featured lists
- INI info aggregator
- Isaac Newton Institute Seminar Series
- School of Physical Sciences
- bld31
Note that ex-directory lists are not shown. |
## Other listsLand Economy Seminars Michaelmas 2020 CamBridgeSens Clare College Graduate Research Forum## Other talksIndefinite theta functions-- Theory and Applications Memory may hide dissipation in active baths Bloomberg: Software Design Dilemmas: Choices We Make In a System With Over Two Million Hits A Day How to Apply Machine Learning to Number Theory Evaluation of the association between myoclonus and cervical intervertebral disc disease in dogs LMB Seminar: The allosteric landscape of a protein |