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
Cited by: 11 works
Citation information provided by
Web of Science
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