Overlap valence on 2+1 flavor domain wall fermion configurations with deflation and low-mode substitution
文献类型：期刊论文
| 作者 | Li, A.1,2; Alexandru, A.3; Chen, Y.4; Doi, T.5; Dong, S. J.2; Draper, T.2; Gong, M.2; Hasenfratz, A.6; Horvath, I.2; Lee, F. X.3 |
| 刊名 | Physical review d
 |
| 出版日期 | 2010-12-01 |
| 卷号 | 82期号:11页码:19 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/physrevd.82.114501 |
| 通讯作者 | Li, a.() |
| 英文摘要 | The overlap fermion propagator is calculated on 2 + 1 flavor domain-wall fermion gauge configurations on 16(3) x 32, 24(3) x 64 and 32(3) x 64 lattices. with hyper-cubic (hyp) smearing and low eigenmode deflation, it is shown that the inversion of the overlap operator can be expedited by similar to 20 times for the 16(3) x 32 lattice and similar to 80 times for the 32(3) x 64 lattice. the overhead cost for calculating eigenmodes ranges from 4.5 to 7.9 propagators for the above lattices. through the study of hyperfine splitting, we found that the o(m(2)a(2)) error is small and these dynamical fermion lattices can adequately accommodate quark mass up to the charm quark. a preliminary calculation of the low-energy constant delta(mix) which characterizes the discretization error of the pion made up of a pair of sea and valence quarks in this mixed-action approach is carried out via the scalar correlator with periodic and antiperiodic boundary conditions. it is found to be small which shifts a 300 mev pion mass by similar to 10 to 19 mevon these sets of lattices. we have studied the signal-to-noise issue of the noise source for the meson and baryon. we introduce a new algorithm with z(3) grid source and low eigenmode substitution to study the many-to-all meson and baryon correlators. it is found to be efficient in reducing errors for the correlators of both mesons and baryons. with 64-point z(3) grid source and low-mode substitution, it can reduce the statistical errors of the light quark (m(pi) similar to 200-300 mev) meson and nucleon correlators by a factor of similar to 3-4 as compared to the point source. the z(3) grid source itself can reduce the errors of the charmonium correlators by a factor of similar to 3. |
| WOS关键词 | LATTICE QCD ; DIRAC OPERATOR ; NUMERICAL-METHODS ; CHIRAL-SYMMETRY ; QUARKS ; NOISE |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000286565600010 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175981 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Li, A. |
| 作者单位 | 1.Duke Univ, Dept Phys, Durham, NC 27708 USA 2.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA 3.George Washington Univ, Dept Phys, Washington, DC 20052 USA 4.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 5.Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan 6.Univ Colorado, Dept Phys, Boulder, CO 80309 USA 7.Tata Inst Fundamental Res, Dept Theoret Phys, Bombay 40005, Maharashtra, India 8.Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany 9.Zhejiang Univ, ZIMP, Hangzhou 310027, Zhejiang, Peoples R China 10.Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, A.,Alexandru, A.,Chen, Y.,et al. Overlap valence on 2+1 flavor domain wall fermion configurations with deflation and low-mode substitution[J]. Physical review d,2010,82(11):19. |
| APA | Li, A..,Alexandru, A..,Chen, Y..,Doi, T..,Dong, S. J..,...&Zhang, J. B..(2010).Overlap valence on 2+1 flavor domain wall fermion configurations with deflation and low-mode substitution.Physical review d,82(11),19. |
| MLA | Li, A.,et al."Overlap valence on 2+1 flavor domain wall fermion configurations with deflation and low-mode substitution".Physical review d 82.11(2010):19. |
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