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Title: Multigrid algorithm for staggered lattice fermions

Journal Article · · Physical Review D

Critical slowing down in Krylov methods for the Dirac operator presents a major obstacle to further advances in lattice field theory as it approaches the continuum solution. Here we formulate a multi-grid algorithm for the Kogut-Susskind (or staggered) fermion discretization which has proven difficult relative to Wilson multigrid due to its first-order anti-Hermitian structure. The solution is to introduce a novel spectral transformation by the Kähler-Dirac spin structure prior to the Galerkin projection. We present numerical results for the two-dimensional, two-flavor Schwinger model, however, the general formalism is agnostic to dimension and is directly applicable to four-dimensional lattice QCD.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Boston Univ., MA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
SC0015845; AC02-07CH11359
OSTI ID:
1457586
Alternate ID(s):
OSTI ID: 1437400; OSTI ID: 1833388
Report Number(s):
FERMILAB-PUB-18-073-CD; arXiv:1801.07823; PRVDAQ; 114513
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 11; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (2)

Lattice gauge theory for physics beyond the Standard Model journal November 2019
Status and future perspectives for lattice gauge theory calculations to the exascale and beyond journal November 2019

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