Integrability in SFT and new representation of KP tau-function

Details Integrability in SFT and new representation of KP tau-function Integrability in SFT and new representation of KP tau-function

2002-11-01

arxiv.org/abs/hep-th/0211010v2

JHEP 0303:027,2003

Physics

High Energy Physics

High Energy Physics - Theory

25 pp, LaTeX, reference added in the Section 3.1

Scientific paper

10.1088/1126-6708/2003/03/027

We are investigating the properties of vacuum and boundary states in the CFT of free bosons under the conformal transformation. We show that transformed vacuum (boundary state) is given in terms of tau-functions of dispersionless KP (Toda) hierarchies. Applications of this approach to string field theory is considered. We recognize in Neumann coefficients the matrix of second derivatives of tau-function of dispersionless KP and identify surface states with the conformally transformed vacuum of free field theory.

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