Iterative methods for overlap and twisted mass fermions
نویسندگان
چکیده
منابع مشابه
Going chiral: overlap versus twisted mass fermions
We compare the behavior of overlap fermions, which are chirally invariant, and of Wilson twisted mass fermions at full twist in the approach to the chiral limit. Our quenched simulations reveal that with both formulations of lattice fermions pion masses of O(250 MeV) can be reached in practical applications. Our comparison is done at a fixed value of the lattice spacing a ≃ 0.123 fm. A number o...
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We present first results of a mixed action project. We analyze gauge configurations generated with two flavors of dynamical twisted mass fermions. Neuberger’s overlap Dirac operator is used for the valence sector. The various choices in the setup of the simulation are discussed. We employ chiral perturbation theory to describe the effects of using different actions in the sea and valence sector...
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The effect of Stout smearing is investigated in numerical simulations with twisted mass Wilson quarks. The phase transition near zero quark mass is studied on 12 3 × 24, 16 3 × 32 and 24 3 × 48 lattices at lattice spacings a ≃ 0.1 – 0.125 fm. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
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We present results of dynamical simulations of Nf = 2 degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses 300 MeV . mPS . 550 MeV. Reaching such small masses was made possible owing to a recently developed variant of the HMC algorithm. The simulations are performed at one value of the lattice spacing a . 0.1 fm. In order to have O(a) improvement and aimin...
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Lattice formulations of QCD with Wilson fermions and a chirally twisted quark mass matrix provide an attractive framework for non-perturbative numerical studies. Owing to reparameterization invariance, the limiting continuum theory is just QCD. No spurious quark zero modes, which are responsible for the problem with exceptional configurations, can occur at finite values of the quark mass. Moreo...
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ژورنال
عنوان ژورنال: Computational Science & Discovery
سال: 2008
ISSN: 1749-4699
DOI: 10.1088/1749-4699/1/1/015001