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The scaling of exact and approximate Ginsparg– Wilson fermions (CROSBI ID 230413)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Bietenholz, Wolfgang ; Hip, Ivan The scaling of exact and approximate Ginsparg– Wilson fermions // Nuclear physics. B, 570 (2000), 1-2; 423-451. doi: 10.1016/S0550-3213(99)00477-0

Podaci o odgovornosti

Bietenholz, Wolfgang ; Hip, Ivan

engleski

The scaling of exact and approximate Ginsparg– Wilson fermions

We construct a number of lattice fermions, which fulfill the Ginsparg–Wilson relation either exactly or approximately, and test them in the framework of the 2-flavor Schwinger model. We start from explicit approximations within a short range, and study this formulation, as well as its correction to an exact Ginsparg–Wilson fermion by the “overlap formula”. Then we suggest a new method to realize this correction perturbatively, without using the tedious square root operator. In this way we combine many favorable properties: good chiral behavior, small mass renormalization, excellent scaling and rotational invariance, as well as a relatively modest computational effort, which makes such formulations most attractive for QCD.

Lattice fermions ; Chiral symmetry ; Cutoff artifacts ; Schwinger model

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Podaci o izdanju

570 (1-2)

2000.

423-451

objavljeno

0550-3213

10.1016/S0550-3213(99)00477-0

Povezanost rada

Fizika

Poveznice
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