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arXiv 0710.0737hep-lat
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高度改进的交错夸克动力学模拟

Dynamical Simulations with Highly Improved Staggered Quarks

K. Y. Wong, R. M. Woloshyn

摘要:

已经确定的是,通过在费米子作用量中使用SU(3)投影的拖尾链,可以大大抑制晶格伪影。一个例子是高度改进的交错夸克作用量,其中ASQ类有效链接是从重新单位化的Fat 7链接构建的。一个通用的程序计算的基础链接(费米子力)的费米子行动的衍生物-一个关键组成部分,在动力学模拟使用分子动力学进化。该方法是迭代的,可以应用于任意水平的涂抹和reunitarization的行动。确定了ASQ作用量和HISQ作用量的费米子力计算代价。试验结果表明,HISQ力的计算比ASQ力的计算要昂贵两倍左右。

英文摘要:

It is well established that lattice artifacts can be suppressed substantially by the use of SU(3)-projected smeared links in the fermion action. An example is the Highly Improved Staggered Quark action where the ASQ-like effective links are constructed from reunitarized Fat7 links. A general procedure is presented for computing the derivative of the fermion action with respect to the base links (fermion force) - a key component in dynamical simulations using molecular dynamics evolution. The method is iterative and can be applied to actions with arbitrary levels of smearing and reunitarization. The cost of calculating the fermion force is determined for the ASQ action and the HISQ action. Test results show that calculating the HISQ force is about two times more expensive than the ASQ force.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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