2000 Fiscal Year Final Research Report Summary
Study of QCD confinement mechanism using large-scale parallel computers
| Project/Area Number |
10440073
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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 |
素粒子・核・宇宙線
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| Research Institution | Kanazawa University |
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Principal Investigator |
SUZUKI Tsuneo Kanazawa University, Physics, Professor, 理学部, 教授 (60019502)
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| Co-Investigator(Kenkyū-buntansha) |
TERAO Haruhiko Kanazawa University, Physics, Assoc. Professor, 自然科学研究科, 助教授 (40192653)
AOKI Ken-ichi Kanazawa University, Playsics, Professor, 理学部, 教授 (00150912)
KUBO Jisuke Kanazawa University, Physics, Professor, 理学部, 教授 (40211213)
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| Project Period (FY) |
1998 – 2000
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| Keywords | Quark confinement / Monopole / Monte-Carlo Simulation / Lattice QCD / Dual transformation / Infrared effective theory of QCD / Finite-temperature phase transition / topology |
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| Research Abstract |
The following results have been obtained mainly from Monte-Carlo simulation studies using SR8000 (VPP500) at KEK and VPP700 at RIKEN :
(1)pure SU (2) QCD : Almost perfect monopole action in the continuum limit is obtained. Along with a perfect operator constructed, it leads us to the rotational invariance in the continuum limit. The action can be transformed exactly into a string theory and the dual Ginzburg-Landau theory on the lattice. (2) pure SU (3) QCD : Almost perfect monopole action for constained three monopole courrents is fixed. The static potential, the string tension and the glueball mass are evaluated. (3) Gauge (in) dependence of abelian dominance : Gauge independence of the monopole physics are studied using various block-spin transformations with various gauges. (4) 3d Georgi-Glashow model : lattice instanton action is fixed numerically for some range of parameters. It is shown to be compatible with the dilute-gas approximation of Polyakov's calculation. (5) Simulations of DGL theory : The electric-field flux distribution is measured in DGL theory numerically which looks similar to that of QCD.(6) T≠0 QCD : From the simulations on anisotropic lattice, space-space and time-time monopole actions are obtained. They are shown to be quite different in the high-temperature phase. (7) full QCD : Intertational collaboration with DESY and ITEP groups has begun. Preliminary data shows monopole density is much higer than that in the quenched case.
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