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Related Experiment Video

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Setting Limits on Supersymmetry Using Simplified Models

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Published on: November 15, 2013

Conformal Perturbation Theory from Open String Field Theory.

Jaroslav Scheinpflug¹, Martin Schnabl¹

¹CEICO, Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.

Physical Review Letters

|April 11, 2025

Summary

This study explores conformal boundary conditions in 2D conformal field theories using open string field theory. Researchers calculated boundary degeneracy to next-to-leading order for a generic theory.

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Area of Science:

Theoretical Physics
Quantum Field Theory

Background:

Conformal boundary conditions in 2D conformal field theories are not well understood.
Boundary deformations connecting these conditions are even less explored.
Conformal perturbation theory is a natural approach but quickly becomes intractable.

Purpose of the Study:

To investigate uncharted territories of conformal boundary conditions in 2D conformal field theories.
To develop a tractable method for studying boundary deformations.
To calculate boundary degeneracy to next-to-leading order for a generic theory.

Main Methods:

Utilizing the formalism of open string field theory.
Constructing a classical solution for the boundary theory.
Extracting boundary theory data from the classical solution.

Main Results:

A method to construct classical solutions for boundary conditions in 2D conformal field theories.
The boundary degeneracy 'g' was calculated to next-to-leading order.
Demonstrated the extraction of boundary theory data from the constructed solution.

Conclusions:

Open string field theory provides a viable framework for studying 2D conformal field theories with boundary conditions.
The developed method offers a tractable approach to analyze boundary deformations.
The calculation of boundary degeneracy provides a concrete result for generic theories.