Causality in String Field Theory

TL;DR

This paper investigates causality in string field theory through a generalized Ramsey scheme and quantum information techniques, providing a new framework for analyzing string interactions and causality.

Contribution

It introduces a generalized Ramsey scheme for string field theory and constructs an explicit characteristic function to analyze causality and information flow.

Findings

Developed a string field theoretical Ramsey scheme

Constructed a characteristic function for interactive string processes

Applied quantum Fisher information to analyze string causality

Abstract

In this letter, we will investigate causality in string field theory using pp-wave light-cone gauge string field theory. We will generalize the Ramsey scheme to string field theory, and use it to analyze string field theoretical processes. An explicit characteristic function for interactive string field theory will be built using this string field theoretical Ramsey scheme. The average of the difference between the initial and final values of any operator described in string field theory will be obtained using this characteristic function. We will use the quantum information theoretical technique based on quantum fisher information to extract information about such string field theoretical processes.