Flavor-twisted boundary conditions can be used for exponential reduction of finite volume artifacts in flavor-averaged observables in lattice QCD calculations with SU(Nf) light quark flavor symmetry. Finite volume artifact reduction arises from destructive interference effects in a manner closely related to the phase averaging which leads to large Nc volume independence. With a particular choice of flavor-twisted boundary conditions, finite volume artifacts for flavor-singlet observables in a hypercubic spacetime volume are reduced to the size of finite volume artifacts in a spacetime volume with periodic boundary conditions that is four times larger.
Bibliographical noteFunding Information:
This work was supported in part by the U.S. Department of Energy under Awards No. DE-FG02-00ER-41132 (A. C.), No. DE-FG02-04ER41338 (S. S.), No. DE-FG02-00ER41132 (M. L. W) and No. DE-SC0011637 (L. G. Y).
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