Date: 
December 3, 2008, 15:30  17:00 
Place: 
Seminar Room at IPMU Prefab. B, Kashiwa Campus of the University of Tokyo 
Speaker: 
Yuji Okawa (University of Tokyo) 
Title: 
"The boundary state from open string fields"

Abstract: 
It is expected that there is a correspondence between boundary
conformal field theories and solutions of open string field
theory. It has been, however, difficult to extract information
on the boundary CFT from the solution. We construct a class of
BRSTinvariant closed string states from open string fields
and claim that they coincide with the boundary state
of the boundary CFT up to a possible BRSTexact term.
We explicitly calculate the closed string state for various
known analytic solutions and find that it precisely coincides
with the boundary state without any BRSTexact term. The talk
is based on arXiv:0810.1737 in collaboration with Kiermaier
and Zwiebach.
