2020年
09/18
開催
開催日時
2020/09/18（金）15:00～16:00
開催場所
オンライン (zoom)
講演者
大川 祐司 教授 ( 東京大学 )
言語
English
詳細ページ
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概要
In typical examples of the AdS/CFT correspondence, the world-sheet theory with holes in the presence of D-branes is assumed to be equivalent in a low-energy limit to a world-sheet theory without holes for a different background such as AdS₅ × S⁵. In the case of the bosonic string, we claim under the assumption of this equivalence that open string field theory on N coincident D-branes can be used to provide a nonperturbative definition of closed string theory based on the fact that the 1/N expansion of correlation functions of gauge-invariant operators reproduces the world-sheet theory with holes where the moduli space of Riemann surfaces is precisely covered.