TY - JOUR
T1 - Suppressing dislocations in normalized hypercubic smearing
AU - Degrand, Thomas
AU - Shamir, Yigal
AU - Svetitsky, Benjamin
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/9/3
Y1 - 2014/9/3
N2 - Normalized hypercubic smearing improves the behavior of dynamical Wilson-clover fermions, but has the unwanted side effect that it can occasionally produce spikes in the fermion force. These spikes originate in the chain rule connecting the derivative with respect to the smeared links to the derivative with respect to the dynamical links, and are associated with the presence of dislocations in the dynamical gauge field. We propose and study an action designed to suppress these dislocations. We present evidence for improved performance of the hybrid Monte Carlo algorithm. A side benefit is improvement in the properties of valence chiral fermions.
AB - Normalized hypercubic smearing improves the behavior of dynamical Wilson-clover fermions, but has the unwanted side effect that it can occasionally produce spikes in the fermion force. These spikes originate in the chain rule connecting the derivative with respect to the smeared links to the derivative with respect to the dynamical links, and are associated with the presence of dislocations in the dynamical gauge field. We propose and study an action designed to suppress these dislocations. We present evidence for improved performance of the hybrid Monte Carlo algorithm. A side benefit is improvement in the properties of valence chiral fermions.
UR - http://www.scopus.com/inward/record.url?scp=84928535711&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.90.054501
DO - 10.1103/PhysRevD.90.054501
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AN - SCOPUS:84928535711
SN - 1550-7998
VL - 90
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 054501
ER -