KEK素粒子原子核研究所・理論セミナー(大川 祐司 氏)

開催日時

2020/09/18 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

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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.