Analytical construction of a nonperturbative vacuum for the open bosonic string

TL;DR

This paper analytically constructs a nonperturbative vacuum state in open bosonic string field theory, providing evidence it represents the endpoint of tachyon condensation on a D25-brane, characterized as a twisted squeezed state.

Contribution

It introduces a recursive analytical method to construct a nonperturbative vacuum in open bosonic string theory, linking it to tachyon condensation.

Findings

Constructed a nonperturbative vacuum recursively

Identified the vacuum as a twisted squeezed state

Provided evidence linking the vacuum to tachyon condensation endpoint

Abstract

Using analytical methods, a nonpertubative vacuum is constructed recursively in the field theory for the open bosonic string. Evidence suggests it corresponds to the Lorentz-invariant endpoint of tachyon condensation on a D25-brane. The corresponding string field is a twisted squeezed state.