Energy Momentum Tensor and Marginal Deformations in Open String Field Theory

Details Energy Momentum Tensor and Marginal Deformations in Open String Field Theory Energy Momentum Tensor and Marginal Deformations in Open String Field Theory

2004-03-22

arxiv.org/abs/hep-th/0403200v2

JHEP 0408:034,2004

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX file, 25 pages; v2: minor additions

Scientific paper

10.1088/1126-6708/2004/08/034

Marginal boundary deformations in a two dimensional conformal field theory correspond to a family of classical solutions of the equations of motion of open string field theory. In this paper we develop a systematic method for relating the parameter labelling the marginal boundary deformation in the conformal field theory to the parameter labelling the classical solution in open string field theory. This is done by first constructing the energy-momentum tensor associated with the classical solution in open string field theory using Noether method, and then comparing this to the answer obtained in the conformal field theory by analysing the boundary state. We also use this method to demonstrate that in open string field theory the tachyon lump solution on a circle of radius larger than one has vanishing pressure along the circle direction, as is expected for a codimension one D-brane.

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