Selected topics in string field theory

TL;DR

This thesis provides a comprehensive introduction to bosonic string field theory, covering both open and closed cases, and includes original research papers on related topics in the field.

Contribution

It offers a detailed pedagogical overview of bosonic SFT and presents new research findings through reprints of four published papers.

Findings

Analysis of analytic solutions in open SFT

Quantization methods for closed SFT vertices

Development of operator technology in string field theory

Abstract

This thesis contains of two parts: The first part is a pedagogical introduction into the field of bosonic SFT. After discussing some general properties we expect, Witten's open SFT and Zwiebach's closed SFT are presented in detail. This means we set up the action, explain the algebraical and geometrical structure and mention physical applications. In the open case we review the most important analytic solutions including the necessary operator technology whileas in the closed case we focus on quantization and the more elaborate construction of the vertices. The second part contains of reprints of papers completed within the PhD: 2301.13182, 2402.00308, 2410.16228 and 2411.15123.