| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We have obtained two important results related to classical solutions in open string field theories. First, we have constructed a new solution corresponding to constant background magnetic field. The solution has no discontinuities but topologically nontrivial. These results reflects non-locality of string field theories. Secondly, we have found closed string symmetries at the identity-based tachyon vacuum solution in open string field theory, where left and right moving modes of an open string are decoupled. We clarified that open strings generate a closed world-sheet, though an open string has end-points.
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