Topological susceptibility from the overlap
نویسندگان
چکیده
منابع مشابه
Topological susceptibility from the overlap
The chiral symmetry at finite lattice spacing of Ginsparg-Wilson fermionic actions constrains the renormalization of the lattice operators; in particular, the topological susceptibility does not require any renormalization, when using a fermionic estimator to define the topological charge. Therefore, the overlap formalism appears as an appealing candidate to study the continuum limit of the top...
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Using a reweighting technique combined with a low-mode truncation of the fermionic determinant, we estimate the quark-mass dependence of the QCD topological susceptibility with overlap fermions. In contrast to previous lattice simulations which all used non-chiral fermions, our results appear to be consistent with the simple continuum model of Dürr. This indicates that at current lattice spacin...
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Two recent methods[1,2] for measuring the topological susceptibility, χt = 〈Q〉 V , in pure SU(2) gauge theory using the lattice regularization are considered to be in disagreement. In one method[1], the gauge fields are smoothed with an improved cooling technique while the topological charge Q is calculated using a lattice discretization. In the other method[2], inverse-blocking is employed to ...
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In quantum field theories with topological sectors, a non-perturbative quantity of interest is the topological susceptibility χt. In principle it seems straightforward to measure χt by means of Monte Carlo simulations. However, for local update algorithms and fine lattice spacings, this tends to be difficult, since the Monte Carlo history rarely changes the topological sector. Here we test a me...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2004
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2004/02/003