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Development of Lattice QCD Simulation System on PC Cluster

PC集群上格子QCD仿真系统的开发

基本信息

批准号：
12554008
负责人：
NAKAMURA Atsushi
金额：
$ 7.74万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

QCD (Quantum Chromo-Dynamics) is the theory of quarks and gluons. Numerical simulations of lattice QCD formulated by Wilson are the most powerful and reliable method to study QCD. Due to the fast development of computers, I.e., the price becomes lower and the speed increases rapidly, the lattice QCO simulations on PC cluster become possible, many researchers in elementary/nuclear physics are interested in the method.Although many theoretical physicists in elementary particle and nuclear physics understand lattice QCD well, it is difficult for them to perform lattice QCD simulations, since it required many knowledge of numerical simulation techniques and long time. In this project wehlave developed an open source code of lattice QCD in Fortran 90. The code is called Lattice Tool Kit in Fortran90 (LTK f90) and can be found athttp://nio-mon.riise.hiroshirna-u.ac.jp/~LTK/Thanks to the module in Fortran90, we can write programs which are similar to the algorithm and easy to understand. Because Fortran90 sometime depends on the compiler of the machine, we have prepared a user-manual, which can also be obtained on the above web.We use MPI (Message Passing Interface) to parallelize the code,and then large lattice size simulations are possible.MPI is the most effective way for parallel programming, but it is not so easy for non-specialist, and also a code with MPI can not be executed under non-MPI compiler. We are now developing a HPF (High Performance Fortran) version of LTK.

QCD(量子色动力学)是夸克和胶子的理论。威尔逊提出的晶格QCD的数值模拟是研究QCD最有力、最可靠的方法。由于计算机的快速发展，即价格的降低和速度的提高，使得在PC机群上进行格子QCO模拟成为可能，引起了许多基础/核物理研究人员的兴趣。虽然许多基本粒子和核物理的理论物理学家对格子QCD很了解，但由于需要大量的数值模拟技术知识和较长的时间，他们很难进行格子QCD模拟。在这个项目中，我们用Fortran 90开发了一个格子QCD的开源代码。该代码被称为Fortran 90中的网格工具包(LTK F90)，可以找到athttp://nio-mon.riise.hiroshirna-u.ac.jp/~LTK/Thanks到Fortran 90中的模块，我们可以编写类似于该算法的程序，并且易于理解。由于Fortran 90有时依赖于机器的编译器，我们编写了一份用户手册，也可以在上面的网站上获得。我们使用MPI(消息传递接口)对代码进行并行化，这样就可以进行大规模的网格模拟。MPI是最有效的并行编程方式，但对于非专业人员来说并不容易，而且使用MPI的代码不能在非MPI编译器下执行。我们现在正在开发LTK的HPF(高性能Fortran)版本。