Nonperturbative aspects of string field theory

2014 Fiscal Year Final Research Report

• Project/Area Number: 24340051
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nara Women's University
• Principal Investigator: TAKAHASHI Tomohiko 奈良女子大学, 自然科学系, 准教授 (10324956)
• Co-Investigator(Kenkyū-buntansha): KISHIMOTO Isao 新潟大学, 人文社会・教育科学系, 准教授 (60399433)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 弦理論 / 弦の場の理論 / Dブレーン / タキオン凝縮 / 単位弦場

Outline of Final Research Achievements

We exactly calculate vacuum energy and gauge invariant overlaps of identity-based tachyon vacuum solutions and identity-based marginal solutions in open string field theory. First, by numerical analysis of the theory expanded around the identity-based solutions, we expect the values of the physical quantities for them. Next, we consider a modified KBc algebra in the theory on this background.　By use of the algebra, classical solutions on the background are constructed and observables for them, including energy densities and gauge invariant overlaps, are calculable. Finally, these results are applied to evaluate observables analytically for the identity-based solutions.

Free Research Field

素粒子論