题目： On the Existence of Heterotic-String and Type-II-Superstring Field Theory Vertices

报告人：周业浩，Perimeter Institute for Theoretical Physics 

时间：2021年5月27日 （星期四）下午 4:00-5:00

地点：东区管理科研楼1418教室

摘要：We consider two problems associated to the space of Riemann surfaces that are closely related to string theory. We first consider the problem of existence of heterotic-string and type-II-superstring field theory vertices in the product of spaces of bordered surfaces parameterizing left- and right-moving sectors of these theories. It turns out that this problem can be solved by proving the existence of a solution to the BV quantum master equation in

moduli spaces of bordered spin-Riemann surfaces. We first prove that for arbitrary genus g, nNS Neveu-Schwarz boundary components, and nR Ramond boundary components such so?lutions exist. We also prove that these solutions are unique up to homotopies in the category of BV algebras.