Variant approach to the overlap action

被引:27
作者
DeGrand, T [1 ]
机构
[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
关键词
D O I
10.1103/PhysRevD.63.034503
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
I describe an implementation of the overlap action, which is built from an action which is itself an approximate overlap action. It appears to be about a factor of 15-20 less expensive to use than the usual overlap action with the Wilson fermion action as its kernel. Ingredients include a fat link to suppress coupling to dislocations and a free field action with a spectrum which resembles an overlap; much of the gain comes from the use of eigenmodes of the approximate action to begin the overlap calculation. As a physics example, I compute the quark condensate in finite volume in the quenched approximation.
引用
收藏
页数:9
相关论文
共 43 条
[1]   GLUEBALL MASSES AND STRING TENSION IN LATTICE QCD [J].
ALBANESE, M ;
COSTANTINI, F ;
FIORENTINI, G ;
FLORE, F ;
LOMBARDO, MP ;
TRIPICCIONE, R ;
BACILIERI, P ;
FONTI, L ;
GIACOMELLI, P ;
REMIDDI, E ;
BERNASCHI, M ;
CABIBBO, N ;
MARINARI, E ;
PARISI, G ;
SALINA, G ;
CABASINO, S ;
MARZANO, F ;
PAOLUCCI, P ;
PETRARCA, S ;
RAPUANO, F ;
MARCHESINI, P ;
RUSACK, R .
PHYSICS LETTERS B, 1987, 192 (1-2) :163-169
[2]   Perturbation theory for fat-link fermion actions [J].
Bernard, C ;
DeGrand, T .
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2000, 83-4 :845-847
[3]   Solutions of the Ginsparg-Wilson relation and improved domain wall fermions [J].
Bietenholz, W .
EUROPEAN PHYSICAL JOURNAL C, 1999, 6 (03) :537-547
[4]   The scaling of exact and approximate Ginsparg-Wilson fermions [J].
Bietenholz, W ;
Hip, I .
NUCLEAR PHYSICS B, 2000, 570 (1-2) :423-451
[5]   On the Neuberger overlap operator [J].
Boriçi, A .
PHYSICS LETTERS B, 1999, 453 (1-2) :46-53
[6]  
BUNK B, 1994, UNPUB DESY REPORT
[7]   The microscopic spectral density of the QCD Dirac operator [J].
Damgaard, PH ;
Osborn, JC ;
Toublan, D ;
Verbaarschot, JJM .
NUCLEAR PHYSICS B, 1999, 547 (1-2) :305-328
[8]   Tests of hypercubic fermion actions [J].
DeGrand, T .
PHYSICAL REVIEW D, 1998, 58 (09)
[9]  
DeGrand T, 1999, PHYS REV D, V60, DOI 10.1103/PhysRevD.60.094501
[10]   Investigating and optimizing the chiral properties of lattice fermion actions [J].
DeGrand, T ;
Hasenfratz, A ;
Kovács, TG .
NUCLEAR PHYSICS B, 1999, 547 (1-2) :259-280