HISQ action in dynamical simulations

MILC Collaboration

HISQ action in dynamical simulations

MILC Collaboration

Department of Physics

Research output: Contribution to journal › Conference Article › peer-review

2 Scopus citations

Abstract

We report on recent progress in employing the Highly Improved Staggered Quark (HISQ) action introduced by the HPQCD/UKQCD collaboration in simulations with dynamical fermions. The HISQ action is an order a² Symanzik-improved action with further suppressed taste symmetry violations. The improvement in taste symmetry is achieved by introducing Fat7 smearing of the original gauge links and reunitarization (projection to an element of U(3) or SU(3)) followed by Asq-type smearing. Major challenges for calculating the fermion force are related to the reunitarization step. We present a preliminary study of the HISQ action on two 2+1+1 flavor ensembles with the lattice spacing roughly equivalent to the MILC asqtad a = 0.125 and 0.09 fm ensembles.

Original language	English (US)
Journal	Proceedings of Science
Volume	66
State	Published - 2008
Event	26th International Symposium on Lattice Field Theory, LATTICE 2008 - Williamsburg, United States Duration: Jul 14 2008 → Jul 19 2008

ASJC Scopus subject areas

General

Cite this

@article{4dc493a25e04411db110135e6bdab5f5,

title = "HISQ action in dynamical simulations",

abstract = "We report on recent progress in employing the Highly Improved Staggered Quark (HISQ) action introduced by the HPQCD/UKQCD collaboration in simulations with dynamical fermions. The HISQ action is an order a2 Symanzik-improved action with further suppressed taste symmetry violations. The improvement in taste symmetry is achieved by introducing Fat7 smearing of the original gauge links and reunitarization (projection to an element of U(3) or SU(3)) followed by Asq-type smearing. Major challenges for calculating the fermion force are related to the reunitarization step. We present a preliminary study of the HISQ action on two 2+1+1 flavor ensembles with the lattice spacing roughly equivalent to the MILC asqtad a = 0.125 and 0.09 fm ensembles.",

author = "{MILC Collaboration} and A. Bazavov and C. Bernard and C. DeTar and W. Freeman and Steven Gottlieb and Heller, {U. M.} and Hetrick, {J. E.} and J. Laiho and L. Levkova and J. Osborn and R. Sugar and D. Toussaint",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 26th International Symposium on Lattice Field Theory, LATTICE 2008 ; Conference date: 14-07-2008 Through 19-07-2008",

year = "2008",

language = "English (US)",

volume = "66",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - HISQ action in dynamical simulations

AU - MILC Collaboration

AU - Bazavov, A.

AU - Bernard, C.

AU - DeTar, C.

AU - Freeman, W.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Hetrick, J. E.

AU - Laiho, J.

AU - Levkova, L.

AU - Osborn, J.

AU - Sugar, R.

AU - Toussaint, D.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2008

Y1 - 2008

N2 - We report on recent progress in employing the Highly Improved Staggered Quark (HISQ) action introduced by the HPQCD/UKQCD collaboration in simulations with dynamical fermions. The HISQ action is an order a2 Symanzik-improved action with further suppressed taste symmetry violations. The improvement in taste symmetry is achieved by introducing Fat7 smearing of the original gauge links and reunitarization (projection to an element of U(3) or SU(3)) followed by Asq-type smearing. Major challenges for calculating the fermion force are related to the reunitarization step. We present a preliminary study of the HISQ action on two 2+1+1 flavor ensembles with the lattice spacing roughly equivalent to the MILC asqtad a = 0.125 and 0.09 fm ensembles.

AB - We report on recent progress in employing the Highly Improved Staggered Quark (HISQ) action introduced by the HPQCD/UKQCD collaboration in simulations with dynamical fermions. The HISQ action is an order a2 Symanzik-improved action with further suppressed taste symmetry violations. The improvement in taste symmetry is achieved by introducing Fat7 smearing of the original gauge links and reunitarization (projection to an element of U(3) or SU(3)) followed by Asq-type smearing. Major challenges for calculating the fermion force are related to the reunitarization step. We present a preliminary study of the HISQ action on two 2+1+1 flavor ensembles with the lattice spacing roughly equivalent to the MILC asqtad a = 0.125 and 0.09 fm ensembles.

UR - http://www.scopus.com/inward/record.url?scp=70449116408&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70449116408&partnerID=8YFLogxK

M3 - Conference Article

AN - SCOPUS:70449116408

SN - 1824-8039

VL - 66

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 26th International Symposium on Lattice Field Theory, LATTICE 2008

Y2 - 14 July 2008 through 19 July 2008

ER -

HISQ action in dynamical simulations

Abstract

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this