期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.201602
关键词
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资金
- DOE [DE-FG02-91ER40676, DE-FC02-06ER41440, DE-FG02-03ER25574, DE-FC02-06ER25784]
- Lawrence Livermore National Laboratory [B568677, B574163, B568399]
- NSF [PHY-0427646, OCI-0749202, OCI-0749317, OCI-0749300, DGE-0221680, DMS-0810982]
- Office of Advanced Cyberinfrastructure (OAC)
- Direct For Computer & Info Scie & Enginr [0749300] Funding Source: National Science Foundation
We present an adaptive multigrid solver for application to the non-Hermitian Wilson-Dirac system of QCD. The key components leading to the success of our proposed algorithm are the use of an adaptive projection onto coarse grids that preserves the near null space of the system matrix together with a simplified form of the correction based on the so-called gamma(5)-Hermitian symmetry of the Dirac operator. We demonstrate that the algorithm nearly eliminates critical slowing down in the chiral limit and that it has weak dependence on the lattice volume.
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