Secret symmetries of type IIB superstring theory on ${\rm Ad}{{{\rm S}}_{3}}$ ? ${{S}^{3}}$ ? ${{M}^{4}}$

摘要: We establish features of so-called Yangian secret symmetries for AdS3 type IIB superstring backgrounds, thus verifying the persistence such to this new instance AdS/CFT correspondence. Specifically, we find two a priori different classes symmetry generators. One class generators, anticipated from previous literature, is more naturally embedded in algebra governing integrable scattering problem. The other generators elusive and somewhat closer its form higher-dimensional AdS5 counterpart. All these respect left-right crossing. In addition, by considering interplay between left right representations, gain perspective on case. also study -realisation establishing incarnation Beisert–de Leeuw construction.