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Title: Mobius domain-wall fermions on gradient-flowed dynamical HISQ ensembles

Journal Article · · Physical Review D
 [1];  [2];  [3];  [4];  [5];  [3];  [6];  [7];  [8];  [9];  [10];  [11]
  1. Forschungszentrum Julich, Julich (Germany); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Glasgow, Glasgow (United Kingdom); College of William and Mary, Williamsburg, VA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. NVIDIA Corp., Santa Clara, CA (United States)
  5. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  6. The State Univ. of New Jersey, Piscataway, NJ (United States)
  7. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  9. Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  10. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); NVIDIA Corp., Santa Clara, CA (United States)
  11. NVIDIA Corp., Santa Clara, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Here, we report on salient features of a mixed lattice QCD action using valence Möbius domain-wall fermions solved on the dynamical Nf = 2+1+1 highly improved staggered quark sea-quark ensembles generated by the MILC Collaboration. The approximate chiral symmetry properties of the valence fermions are shown to be significantly improved by utilizing the gradient-flow scheme to first smear the highly improved staggered quark configurations. The greater numerical cost of the Möbius domain-wall inversions is mitigated by the highly efficient QUDA library optimized for NVIDIA GPU accelerated compute nodes. We have created an interface to this optimized QUDA solver in Chroma. We provide tuned parameters of the action and performance of QUDA using ensembles with the lattice spacings a≃{0.15,0.12,0.09} fm and pion masses mπ≃{310,220,130} MeV. We have additionally generated two new ensembles with a~0.12 fm and mπ~{400,350} MeV. With a fixed flow time of tgf=1 in lattice units, the residual chiral symmetry breaking of the valence fermions is kept below 10% of the light quark mass on all ensembles, mres≲0.1×ml, with moderate values of the fifth dimension L5 and a domain-wall height M5 ≤ 1.3. As a benchmark calculation, we perform a continuum, infinite volume, physical pion and kaon mass extrapolation of F/Fπ± and demonstrate our results are independent of flow time and consistent with the FLAG determination of this quantity at the level of less than one standard deviation.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
PHY-1125915; AC05-00OR22725; AC52-07NA27344; AC05-06OR23177; AC02-05CH11231; FG02-04ER41302; SC00046548; SC0015376; KB0301052; SC0012704
OSTI ID:
1395852
Alternate ID(s):
OSTI ID: 1394687; OSTI ID: 1413172; OSTI ID: 1425164; OSTI ID: 1425425
Report Number(s):
JLAB-THY-17-2503; DOE/OR/23177-4168; arXiv:1701.07559; LLNL-JRNL-719521; RBRC-1227; BNL-114865-2017-JAAM; PRVDAQ
Journal Information:
Physical Review D, Vol. 96, Issue 5; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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