Topological solitons in field theories: How ubiquitous are they in nature?

by Prof. Minoru Eto (Yamagata U.)

Monday 14 Jul 2025, 15:30 → 17:30 Asia/Tokyo

C104 (Faculty of Science, U. Toyama)

My talk consists of two parts: The first half is devoted to a basic introduction 

to topological solitons in field theories, including order parameter spaces, homotopy, 

topological stability and so on. In the second part I introduce three concrete examples

from my recent studies. 1) Knot solitons in particle physics and cosmology, 

2) Dislocations (topological defects known in atomic crystals and nematic liquid crystal) 

and crystallization of chiral soliton lattice in finite density QCD, 3) Skeletal structure 

of marine planktons and SUSY topological solitons. 

By bringing together these seemingly unrelated topics in one talk, I hope to demonstrate 

how ubiquitous topological solitons are in nature.