Variance reduction with practical all-to-all lattice propagators
نویسندگان
چکیده
منابع مشابه
Practical all-to-all propagators for lattice QCD
A new method for computing all elements of the lattice quark propagator is proposed. The method combines the spectral decomposition of the propagator, computing the lowest eigenmodes exactly, with noisy estimators which are ‘diluted’, i.e. taken to have support only on a subset of time, space, spin or colour. We find that the errors are dramatically reduced compared to traditional noisy estimat...
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Hadron spectroscopy on dynamical configurations are faced with the difficulties of dealing with the mixing of single particle states and multi-hadron states (for large spatial volumes and light dynamical quarks masses). It is conceivable that explicit multi-hadron interpolating operators will be necessary for obtaining sufficiently good overlap on to multi-hadron states in order to extract the ...
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JLQCD collaboration: T. Kaneko∗a,b†, H. Fukayac, S. Hashimotoa,b, H. Matsufurua, J. Noakia, T. Onogid and N. Yamadaa,b a High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan b School of High Energy Accelerator Science, The Graduate University for Advanced Studies (Sokendai), Ibaraki 305-0801, Japan c Theoretical Physics Laboratory, RIKEN, Saitama 351-0198, Japan d Yukawa...
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We discuss methods to obtain accurate hadronic spectra with propagating quarks. Comparing the determination of masses for spin-exotic hybrid mesons with glueball mass determinations, we conclude that quark propagators from all sites to all other sites would enable great improvement in the errors. Such propagators are achievable by using stochastic estimators. We discuss previous attempts and pr...
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ژورنال
عنوان ژورنال: Computer Physics Communications
سال: 2015
ISSN: 0010-4655
DOI: 10.1016/j.cpc.2015.04.017