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Extrapolation Methods for the Dirac Inverter in Hybrid Monte Carlo

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 نشر من قبل Andrea Ruben Levi
 تاريخ النشر 1994
  مجال البحث
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In Hybrid Monte Carlo(HMC) simulations for full QCD, the gauge fields evolve smoothly as a function of Molecular Dynamics (MD) time. Thus we investigate improved methods of estimating the trial solutions to the Dirac propagator as superpositions of the solutions in the recent past. So far our best extrapolation method reduces the number of Conjugate Gradient iterations per unit MD time by about a factor of 4. Further improvements should be forthcoming as we further exploit the information of past trajectories.



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