Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-09-18
JHEP 0712:038,2007
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 2 figures, some comments and one table added, version to appear in JHEP
Scientific paper
10.1088/1126-6708/2007/12/038
We consider quadratic fluctuations around the tachyon vacuum numerically in open string field theory. We work on a space ${\cal H}_N^{{\rm vac}}$ spanned by basis string states used in the Schnabl's vacuum solution. We show that the truncated form of the Schnabl's vacuum solution on ${\cal H}_N^{{\rm vac}}$ is well-behaved in numerical work. The orthogonal basis for the new BRST operator $\tilde Q$ on ${\cal H}_N^{{\rm vac}}$ and the quadratic forms of potentials for independent fields around the vacuum are obtained. Our numerical results support that the Schnabl's vacuum solution represents the minimum energy solution for arbitrary fluctuations also in open string field theory.
Kwon O-Kab
Lee Bum-Hoon
Park Chanyong
Sin Sang-jin
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