International collaboration on the vacuum structure of full QCD using large-scale parallel computers

利用大规模并行计算机研究全QCD真空结构的国际合作

• 批准号: 15340073
• 负责人: SUZUKI Tsuneo
• 金额: $ 10.3万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340073/
• 关键词: monopole; quantum chromodynamics; quark confinement; monopole; color confinement; Lattice QCD; Monte Carlo Simulation; dual Meissner effect; dual Ginzburg-Landau theory; instanton; finite-temperature phase transition

The following results have been obtained mainly from Monte-Carlo simulation studies using SR8000 at KEK and SX7 at RIKEN :(1)DIK group study of finite-tenperature full QCD :International collaboration with DESY and ITEP groups. The phase transition temperature is determined on lattices of 16^3X8 and 24^3X10 using an 0(alpha) improved clover fermion action with Nf=2 light quarks. Using the previos data at Nt=4 and Mt=6,we have obtained for the first time the phase transition temperature in the chiral and the continuum limits, although the quark mass used is not light enough. We are continuing the simulations at lighter quark masses using a new BlueGene maschine at KEK.(2)Gauge invariance of the confinement mechanism :Confinement is a physical phenomenon and so there must be a gauge-invariant mechanism explaining confinement. Up to now abelian projection methods using some non-local gauges can explain the confinement beautifully as the dual Meissner effect.Using SX7 at Riken and performing an extensive Monte-Carlo simulations, we have found even in Landau gauge, the abelian dual Meissner effect works good. However in the gauge, there are no abelian monopoles, but instead the magnetic displacement currents squeezes the electric field.This kind of picture is expected to work in general and so we are doing simulations in various local gauges (known as a bad gauge) to check the expectation.

以下结果主要是从蒙特 - 卡洛模拟研究中使用SR8000在kek和riken上的SX7进行的：（1）DIK组有限体育全QCD研究：与DESY和ITEP组的国际合作。使用0（alpha）改进的Clover fermion动作，NF = 2 Quarks在16^3x8和24^3x10上确定相变温度。使用nt = 4和mt = 6时的previos数据，我们首次获得了手性和连续限制的相变温度，尽管所使用的夸克质量不够轻。我们正在使用Kek的新蓝gen子市场继续在较轻的夸克质量上进行模拟。（2）限制机制的规格不变性：限制是一种物理现象，因此必须有一种仪表不变的机制来解释限制。到现在为止，使用某些非本地仪表的阿贝尔投影方法可以很好地解释限制为双重MEISSNER效应。在Riken上使用SX7并进行了广泛的蒙特卡罗模拟，我们甚至在Landau Gauge中发现，Abelian Dual Meissner效应也很有效。然而，在规格中，没有阿贝尔单孔，而是磁性位移电流挤压电场。这种图像通常可以正常工作，因此我们正在以各种本地仪表（称为不良仪表）进行模拟来检查期望。

项目成果

Baryonic Flux in Quenched and Two-Flavor Dynamical QCD

淬火和二味动态 QCD 中的重子通量

• 发表时间: 2004
• 期刊: Phys.Rev. D70
• 作者: K. Ishikawa;N. Maeda;V.G.Bornyakov et al.
• 通讯作者: V.G.Bornyakov et al.

Determination of monopole condensate from monopole action in quenched SU(2) QCD

通过淬灭 SU(2) QCD 中的单极作用测定单极凝聚

• 发表时间: 2004
• 期刊: Phys. Rev. D69
• 作者: M.N.Chernodub;K.Ishiguro;T.Suzuki
• 通讯作者: T.Suzuki

Shoichi Ito et al.: "Gauge Problem of Monopole Dynamics in SU(2) Lattice Gauge Theory"Phys.Rev.. D67. 074504 (2003)

Shoichi Ito 等人：“SU(2) 晶格规范理论中单极子动力学的规范问题”Phys.Rev.. D67。

Matter degrees of freedom and string breaking in Abelian projected quenched SU(2) QCD

阿贝尔投影淬火 SU(2) QCD 中的物质自由度和弦断裂

• 发表时间: 2004
• 期刊: Phys.Rev.D 70
• 作者: M.N.Chernodub;Koichi Hashimoto;Tsuneo Suzuki
• 通讯作者: Tsuneo Suzuki

M.N.Chernodub et al.: "Numerical determination of monopole entropy in pure SU(2) QCD"Phys.Rev.. D69. 014509 (2004)

M.N.Chernodub 等人：“纯 SU(2) QCD 中单极熵的数值测定”Phys.Rev..D69。