Introduction to String Field Theory

@inproceedings{Siegel1988IntroductionTS,
  title={Introduction to String Field Theory},
  author={Warren Siegel},
  year={1988}
}
This volume covers the most up-to-date findings on string field theory. It is presented in a new approach as a result of insights gained from the theory. This includes the use of a universal method for treating free field theories, which allows the derivation of a single, simple, free, local, Poincare-invariant, gauge-invariant action that can be applied directly to any fields. 
Generating Functional in String Field Theory
In our paper, we introduce a path integral of general functional field in order to build the path integral formalism in string field theory from the fact that a string field is a functional field,
Closed String Field Theory: An Introduction
In these introductory notes I explain some basic ideas in string field theory. These include: the concept of a string field, the issue of background independence, the reason why minimal area metrics
PHYSICAL DEGREES OF FREEDOM IN 2D STRING FIELD THEORIES
States in the absolute (semi-relative) cohomology but not in the relative cohomology are examined through the component decomposition of the string field theory action for the 2D string. It is found
SFT-inspired Algebraic Structures in Gauge Theories
We consider gauge theories in a String Field Theory-inspired formalism. The constructed algebraic operations lead in particular to homotopy algebras of the related BV theories. We discuss invariant
Higher-spin gauge fields and duality
We review the construction of free gauge theories for gauge fields in arbitrary representations of the Lorentz group in $D$ dimensions. We describe the multi-form calculus which gives the natural
The static tachyon potential in the open bosonic string theory
Abstract In an effort to understand whether the open bosonic string theory has a stable vacuum, the four-point contribution to the static tachyon potential is computed. This off-shell calculation is
Covariant off-shell string amplitudes with auxiliary fields
Abstract We employ BRST invariance to explicitly determine the ghost part of the four-point vertex in Witten's open, bosonic, string field theory. This allows the computation of any covariant
Off-shell string physics from conformal field theory
Abstract The subject of off-shell conformal field theory is developed and is used to produce the off-shell amplitudes of string field theory. The method is also applied to the reparametrization
On the modified superstring field theory
Abstract Investigations are made concerning tree-level bosonic amplitudes in the modified superstring field theory. The question of on-shell agreement with the first-quantized approach as well as
String field theory in minimal model backgrounds and non-perturbative two-dimensional gravity
The classical phase space of free closed-string field theory in the background of (p, q) minimal models is studied. It is shown that in the limit q → ∞ for fixed p, this becomes the phase space of p
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References

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Abstract Witten's Raymond string field theory is observed to possess new gauge symmetries, which guarantee the consistency and the equivalence of Witten's theory to the other formulation based on the
String field theory on the conformal plane. II: Generalized gluing
In our previous paper, we defined multistring vertices by conformally mapping string states onto the complex plane. In this paper, we prove the combination rules for these vertices. The contraction
Constraints on covariant theories for closed string fields
Assuming essential light-cone features persist in covariant closed string field theory a set of constraints is discussed. The contracted three-point vertex must generate all inequivalent tori. This
GLOBAL ANOMALIES IN STRING THEORY
This paper addresses various questions involving global anomalies in particle theory and string theory. It is shown that the question of whether a manifold is a spin manifold is equivalent to a
Introduction To Supersymmetry And Supergravity
The publication of the first edition of “Introduction to Supersymmetry and Supergravity” was a remarkable success. This second edition contains a substantial amount of new material especially on
COVARIANTIZED CLOSED STRING FIELDS FROM LIGHT-CONE
Starting from an off-shell interacting Lorentz algebra for closed string fields, the procedure of covariantisation, truncation and rescaling by string length gives a BRST operator equivalent to that
UNIVERSAL SUPERSYMMETRY BY ADDING 4+4 DIMENSIONS TO THE LIGHT CONE
We extend the previous method for deriving manifestly Lorentz and gauge covariant free field theories from the light cone for arbitrary Poincare representations to arbitrary supersymmetry
The vertex as a Bogoliubov-transformed vacuum state in string field theory
We develop the point of view that the string vertex is nothing but the Bogoliubov-transformed SL(2, R)-invariant out-ground state induced by the conformal (Mandelstam) mapping. We explicitly
Quantization of the Green-Schwarz superstring
Abstract The problem of quantization of superstrings is traced back to the nilpotency of gauge generators of the first-generation ghosts. The quantization of such theories is performed. The novel
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