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Worldline Approach to Chiral Fermions

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arxiv 0709.4595 v1 pith:2QXQFIP4 submitted 2007-09-28 hep-lat hep-phhep-th

Worldline Approach to Chiral Fermions

classification hep-lat hep-phhep-th
keywords numericalchiralworldlineapproachcalculationfiniteresultssymmetry
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose to apply ``worldline numerics'' to a numerical calculation of quark determinants. The Gross-Neveu model with a U(1) chiral symmetry is considered as a first test. The worldline approach allows for an analytic renormalisation, and only finite parts of the determinant require a numerical calculation. It is shown that the discretisation of the worldlines, which is central to the numerical treatment, preserves chiral symmetry exactly. Numerical results for a kink configuration as a scalar background field are shown and compared with analytical results. The case of finite fermion chemical potential is also briefly discussed.

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