Martedì 3 marzo 2020 alle ore 14:00, presso l'Aula B del Plesso di Matematica, il Prof. Ihsan Topaloglu (Virginia Commonwealth University) terrà un seminario dal titolo
"Anisotropic Extensions of the Liquid Drop Model".
In this talk I will present on recent results regarding a variant of Gamow's liquid drop model, initially developed to predict the shape of atomic nuclei, with an anisotropic surface energy. This universal model can be considered as a perturbation of the anisotropic isoperimetric problem by nonlocal long-range interactions. Under suitable regularity and ellipticity assumptions on the surface tension, Wulff shapes are minimizers in this problem if and only if the surface energy is isotropic. Moreover for smooth anisotropies, in the small nonlocality regime, minimizers converge to the Wulff shape in $C^1$-norm with a quantitative rate of convergence. It is also possible to obtain a quantitative expansion of the energy of any minimizer around the energy of the Wulff shape which yields a geometric stability result for minimizers. For certain crystalline surface tensions one can determine the global minimizer explicitly and obtain its exact energy expansion in terms of the nonlocality parameter. Results will be drawn from projects joint with Rustum Choksi, Robin Neumayer, and Oleksandr Misiats.