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On current algebras, generalised fluxes and non-geometry

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arxiv 1910.00029 v2 pith:EL22LPQ4 submitted 2019-09-30 hep-th math-phmath.MP

On current algebras, generalised fluxes and non-geometry

classification hep-th math-phmath.MP
keywords currentalgebrabackgroundsfluxesgeneralisedbackgrounddeformedformulation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A Hamiltonian formulation of the classical world-sheet theory in a generic, geometric or non-geometric, NSNS background is proposed. The essence of this formulation is a deformed current algebra, which is solely characterised by the generalised fluxes describing such a background. The construction extends to backgrounds for which there is no Lagrangian description -- namely magnetically charged backgrounds or those violating the strong constraint of double field theory -- at the cost of violating the Jacobi identity of the current algebra. The known non-commutative and non-associative interpretation of non-geometric flux backgrounds is reproduced by means of the deformed current algebra. Furthermore, the provided framework is used to suggest a generalisation of Poisson-Lie $T$-duality to generic models with constant generalised fluxes. As a side note, the relation between Lie and Courant algebroid structures of the string current algebra is clarified.

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Cited by 4 Pith papers

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