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    Evaluation of disconnected quark loops for hadron structure using GPUs

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    Genre
    Journal Article
    Date
    2014-05-01
    Author
    Alexandrou, C
    Constantinou, M
    Drach, V
    Hadjiyiannakou, K
    Jansen, K
    Koutsou, G
    Strelchenko, A
    Vaquero, A
    Subject
    Hadron physics
    Lattice QCD
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5880
    
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    DOI
    10.1016/j.cpc.2014.01.009
    Abstract
    A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency when implemented on Graphics Processing Units (GPUs). We assess the performance of the various methods by studying the convergence and statistical accuracy obtained for observables that require a large number of stochastic noise vectors, such as the isoscalar nucleon axial charge. The various methods are also examined for the evaluation of sigma-terms where noise reduction techniques specific to the twisted mass formulation can be utilized thus reducing the required number of stochastic noise vectors. © 2014 Elsevier B.V. All rights reserved.
    Citation to related work
    Elsevier BV
    Has part
    Computer Physics Communications
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5862
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