Now showing items 1-2 of 2

    • Improved scaling for quantum monte carlo on insulators 

      Ahuja, K.; Clark, B. K.; De Sturler, E.; Ceperley, D. M.; Kim, J. (Siam Publications, 2011)
      Quantum Monte Carlo (QMC) methods are often used to calculate properties of many body quantum systems. The main cost of many QMC methods, for example, the variational Monte Carlo (VMC) method, is in constructing a sequence ...
    • Preconditioners for generalized saddle-point problems 

      Siefert, C.; De Sturler, E. (Siam Publications, 2006)
      We propose and examine block-diagonal preconditioners and variants of indefinite preconditioners for block two-by-two generalized saddle-point problems. That is, we consider the nonsymmetric, nonsingular case where the ( ...