讲座人：Wojtek Zakrzewski 英国杜伦大学教授
讲座地点：ZOOM ID：911 1989 7278 密 码：123456
报告摘要：In this talk I will discuss BPS conditions in theories in (1+1) dimensions when these theories involve more than one field. This provides a generalisation of the Bogomolnyi's trick to more fields. Such solutions involve interacting kinks and antikinks. We will then discuss various properties of such fields and, in particular, what happens when some of these topological kinks are pushed towards each other etc.
Wojtek Zakrzewski has been a professor of mathematical physics at Durham University (UK) since 1995 and is now an emeritus professor(since 2016). Wojtek received his Ph.D. from Cambridge University (UK)in 1970 under the supervision of Prof. John Polkinghorne. Thereafter he was a postdoc at the University of Michigan (USA) from 1970-1972 and a junior research fellow at Cambridge University (UK) from 1972-1973,whereafter he went to Durham University where he held the positions as lecturer (1973), senior lecturer (1981) and reader (1992) before becoming a professor. Additionally, he has been a research fellow and a research associate at CERN (Switzerland) and had many visiting fellowship in the USA, Canada, South America and Europe. Wojtek is well known for his work in soliton dynamics, soliton scattering, inparticular on baby Skyrmions, Chern-Simons theories, noncommutative geometry, Galilean symmetries, the CP(N) model and instantons. Wojtek has published over 290 research papers in Phys. Rev. Lett., JHEP, Phys.Rev. D, Phys. Rev. E, Lett. Math. Phys., Nonlinearity, J. Math. Phys.,J. Geom. Phys., Nucl. Phys. B, Annals Phys., Phys. Lett. A, Phys. Lett.B, J. Phys. A, Z. Phys. C, Eur. Phys. J. C, JETP Lett., Class. Quant.Grav., Nuovo Cim. A, Lett. Nuvo. Cim., Physica D, Entropy, Europhys.Lett., and has authored a book on Low-dimensional Sigma Models.