| Project/Area Number |
14340040
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Basic analysis
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| Research Institution | The University of Tokyo |
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Principal Investigator |
JIMBO Michio The University of Tokyo, Graduate School of Mathematical Sciences, professor, 大学院・数理科学研究科, 教授 (80109082)
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| Co-Investigator(Kenkyū-buntansha) |
MIWA Tetsuji Kyoto University, Graduate School of science, professor, 大学院・理学研究科, 教授 (10027386)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 2003: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2002: ¥2,800,000 (Direct Cost: ¥2,800,000)
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| Keywords | Conformal field theory / Coinvariants / Macdonald polynomials / form factors / Sine-Gordon model / quantum affine algebras / 量子群 / フュージョン積 / 指標 / マクドナルド多項式 / フェルミ型公式 |
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| Research Abstract |
We investigated the conformal coinvariants and its application to integrable quantum field theory.
(i)The conformal coinvariants associated with integrable highest weight representations of affine Lie algebras have a natural filtration. We proved that they are isomorphic as filtered space to the space of coinvariants of the fusion products of finite dimensional modules in the sense of Feigin-Loktev. In some simple cases we also obtained explicit character formulas for the characters in terms of the restricted Kostka polynomials.
(ii)We studied a family of symmetric polynomials satisfying certain zero conditions on the (shifted) diagonals. We showed that the ideal spanned by them has a basis in terms of a family of Macdonald polynomials at specific values of parameters q, t (q^<r-1>t^<k+1>=1).
(iii)We studied the space of local fields in integrable quantum field theory, in the framework of the form factor bootstrap approach. Using their integral representations, each local, field is specified by an infinite series of polynomials which appear as integrand. In the case of the SU(2)-invariant Thirring model, we introduced an action of the quantum affine algebra U_√<-1>(<sl_2>^^^^) in the space of such sequences of polynomials, and proved that this space is isomorphic to the tensor product of the level 1 highest and level -1 lowest modules.
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