### Resumé

Originalsprog | Udefineret/Ukendt |
---|---|

Tidsskrift | Nuclear and Particle Physics Proceedings |

ISSN | 2405-6014 |

DOI | |

Status | Udgivet - 31. aug. 2004 |

### Bibliografisk note

Talk presented at Lattice2004(theory), Fermilab, June 21-26, 2004### Emneord

- hep-lat

### Citer dette

*Nuclear and Particle Physics Proceedings*. https://doi.org/10.1016/j.nuclphysbps.2004.11.283

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*Nuclear and Particle Physics Proceedings*. https://doi.org/10.1016/j.nuclphysbps.2004.11.283

**The locality problem for two tastes of staggered fermions.** / Bunk, B.; Morte, M. Della; Jansen, K.; Knechtli, F.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

TY - JOUR

T1 - The locality problem for two tastes of staggered fermions

AU - Bunk, B.

AU - Morte, M. Della

AU - Jansen, K.

AU - Knechtli, F.

N1 - Talk presented at Lattice2004(theory), Fermilab, June 21-26, 2004

PY - 2004/8/31

Y1 - 2004/8/31

N2 - We address the locality problem arising in simulations, which take the square root of the staggered fermion determinant as a Boltzmann weight to reduce the number of dynamical quark tastes from four to two. We study analytically and numerically the square root of the staggered fermion operator as a candidate to define a two taste theory from first principles. Although it has the correct weight, this operator is non-local in the continuum limit. Our work serves as a warning that fundamental properties of field theories might be violated when employing blindly the square root trick. The question, whether a local operator reproducing the square root of the staggered fermion determinant exists, is left open.

AB - We address the locality problem arising in simulations, which take the square root of the staggered fermion determinant as a Boltzmann weight to reduce the number of dynamical quark tastes from four to two. We study analytically and numerically the square root of the staggered fermion operator as a candidate to define a two taste theory from first principles. Although it has the correct weight, this operator is non-local in the continuum limit. Our work serves as a warning that fundamental properties of field theories might be violated when employing blindly the square root trick. The question, whether a local operator reproducing the square root of the staggered fermion determinant exists, is left open.

KW - hep-lat

U2 - 10.1016/j.nuclphysbps.2004.11.283

DO - 10.1016/j.nuclphysbps.2004.11.283

M3 - Tidsskriftartikel

JO - Nuclear and Particle Physics Proceedings

JF - Nuclear and Particle Physics Proceedings

SN - 2405-6014

ER -