| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
We construct a numerical tachyon vacuum solution with the highest accuracy in the world. As a result, we clarify that an identity-based solution can be regarded as the tachyon vacuum solution. In addition, we consider quantum effects in string field theories by using numerical and analytic methods. We show that a quantum effect should be vanished by some cancelation at the tachyon vacuum.
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