Stability of lattice QCD simulations and the thermodynamic limit
نویسندگان
چکیده
منابع مشابه
Stability of lattice QCD simulations and the thermodynamic limit
We study the spectral gap of the Wilson–Dirac operator in two-flavour lattice QCD as a function of the lattice spacing a, the space-time volume V and the current-quark mass m. It turns out that the median of the probability distribution of the gap scales proportionally to m and that its width is practically equal to a/ √ V . In particular, numerical simulations are safe from accidental zero mod...
متن کاملThe chiral limit in lattice QCD
It has been a big challenge for lattice QCD to simulate dynamical quarks near the chiral limit. Theoretically, it is well-known that the naive chiral symmetry cannot be realized on the lattice (the Nielsen-Ninomiya theorem). Also practically, the computational cost rapidly grows as the quark mass is reduced. The JLQCD collaboration started a project to perform simulations with exact but modifie...
متن کاملDeflation acceleration of lattice QCD simulations
Close to the chiral limit, many calculations in numerical lattice QCD can potentially be accelerated using low-mode deflation techniques. In this paper it is shown that the recently introduced domain-decomposed deflation subspaces can be propagated along the field trajectories generated by the Hybrid Monte Carlo (HMC) algorithm with a modest effort. The quark forces that drive the simulation ma...
متن کاملPerformance of machines for lattice QCD simulations
We review the architecture of massively parallel machines used for lattice QCD simulations and present benchmarks for the performance of popular algorithms on these platforms. We cover commercial supercomputers, PC clusters, and custom-designed machines. We also speculate on future developments. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial...
متن کاملHadron Spectrum from Dynamical Lattice QCD Simulations
In the long standing challenge of the calculation of hadron spectrum from the first-principles lattice QCD simulation, the inclusion of dynamical quarks, or unquenching, has been the crucial but computationally demanding step. Thanks to the rapid increase of the computer power and recent developments in the lattice formulations and numerical algorithms, such simulations have become feasible in ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2006
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2006/02/011