A novel quark-field creation operator construction for hadronic physics in lattice QCD

Journal Article · Tue Sep 01 00:00:00 EDT 2009 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.80.054506· OSTI ID:977153

Michael Peardon, Jozef Dudek, Robert Edwards, Huey-Wen Lin, David Richards, John Bulava, Colin Morningstar, Keisuke Juge

A new quark-field smearing algorithm is defined which enables efficient calculations of a broad range of hadron correlation functions. The technique applies a low-rank operator to define smooth fields, that are to be used in hadron creation operators. The resulting space of smooth fields is small enough that all elements of the reduced quark propagator can be computed exactly at reasonable computational cost. Correlations between arbitrary sources, including multi-hadron operators can be computed {\em a posteriori} without requiring new lattice Dirac operator inversions. The method is tested on realistic lattice sizes with light dynamical quarks.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 977153
• Report Number(s): JLAB-THY-09-985; DOE/OR/23177-0706; PRVDAQ; TRN: US1002800
• Journal Information: Physical Review D, Vol. 80; ISSN 1550-7998
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
CONSTRUCTION
CORRELATION FUNCTIONS
CREATION OPERATORS
DIRAC OPERATORS
HADRONS
PHYSICS
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUARKS