报告题目：Strings, Integrable Models and Biology: A New Frontier?

报 告 人：Antti Niemi，Uppsala University, Sweden

报告时间：10月25日（周五）10：00

报告地点：物理系三楼报告厅

报告摘要：This talk is intended to be a pedestrian introduction to theoretical physics of proteins. We first give a very general introduction to proteins, and their structure. We describe why the protein folding problem is so important. We explain the general structure of proteins as string-like configurations and propose that the protein folding problem falls in the general category with strings. We analyze the extrinsic geometry of string-like structures and argue - on general grounds - that the energy function coincides with that of Abelian Higgs Model with spontaneously broken symmetry. The discrete version of the energy function is shown to support topological solitons, and these solitons are interpreted in terms of string geometry. Finally, it is shown that solitons are common in all biologically active proteins: Each of us is made out of some 10^20 topological solitons.