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A boundary term for open string field theory

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arxiv 2411.15123 v2 pith:OTL5ZS5Q submitted 2024-11-22 hep-th

Georg Stettinger This is my paper
classification hep-th
keywords boundaryfieldstringopentermtheoryvertexaction
verification ladder T0 review T1 audit T2 compute T3 formal
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We consider Witten's open string field theory in the presence of a non-trivial boundary of spacetime. For the kinetic term, we derive a Gibbons-Hawking-type contribution that has to be added to the action to guarantee a well-defined variational principle. The derivation is done first in a heuristic way and then confirmed by a path integral based approach using the CFT operator formalism. In the last section we discuss the boundary contributions coming from the cubic vertex, although it is problematic to apply consistent boundary conditions on the string field due to the non-locality of the vertex.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The BEF Symplectic Form: A Lagrangian Perspective

    hep-th 2026-04 unverdicted novelty 7.0 of 10

    The BEF symplectic form is derived from L∞-Lagrangians via covariant phase space methods and coincides with the Barnich-Brandt form for second-order equations of motion.

  2. Covariant phase space and $L_\infty$ algebras

    hep-th 2025-06 conditional novelty 7.0 of 10

    A covariant phase space symplectic form is constructed for any L∞ Lagrangian field theory using a 'sigmoid' operator, and is verified in scalar, Yang-Mills, general relativity, and p-adic string examples.

  3. Type II RR string fields and exotic diffeomorphisms

    hep-th 2025-05 accept novelty 7.0 of 10

    The paper computes explicit gauge transformations and interactions for all Ramond-Ramond fields in type II string field theory, revealing diffeomorphisms that are not standard Lie derivatives.

  4. Symplectic structure in open string field theory III: Electric field

    hep-th 2026-04 conditional novelty 6.0 of 10

    OSFT symplectic energy of a constant-electric-flux D-brane matches the DBI energy via a generalized Ellwood invariant for nonpolynomial theories.

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