Homotopy Algebra Morphism and Geometry of Classical String Field Theory

Details Homotopy Algebra Morphism and Geometry of Classical String Field Theory Homotopy Algebra Morphism and Geometry of Classical String Field Theory

2001-12-24

arxiv.org/abs/hep-th/0112228v2

Nucl.Phys. B630 (2002) 361-432

Physics

High Energy Physics

High Energy Physics - Theory

79 pages, the first half is based on the review talk presented at the Summer Institute 2001 at Fuji-Yoshida in Japan, v2: figu

Scientific paper

We discuss general properties of classical string field theories with symmetric vertices in the context of deformation theory. For a given conformal background there are many string field theories corresponding to different decomposition of moduli space of Riemann surfaces. It is shown that any classical open string field theories on a fixed conformal background are $A_\infty$-quasi-isomorphic to each other. This indicates that they have isomorphic moduli space of classical solutions. The minimal model theorem in $A_\infty$-algebras plays a key role in these results. Its natural and geometric realization on formal supermanifolds is also given. The same results hold for classical closed string field theories, whose algebraic structure is governed by $L_\infty$-algebras.

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