Lattice QCD on Small Computers

Abstract

We demonstrate that lattice QCD calculations can be made $10^3$--$10^6$ times faster by using very coarse lattices. To obtain accurate results, we replace the standard lattice actions by perturbatively-improved actions with tadpole-improved correction terms that remove the leading errors due to the lattice. To illustrate the power of this approach, we calculate the static-quark potential, and the charmonium spectrum and wavefunctions using a desktop computer. We obtain accurate results that are independent of the lattice spacing and agree well with experiment.

15 pages, 3 figs incl as LaTex pictures Minor additions to tables and text

References in corpus (5)

• A New Way to Set the Energy Scale in Lattice Gauge Theories and its Application to the Static Force and ${\alpha }_s$ in SU(2) Yang--Mills Theory
• Precision Upsilon Spectroscopy from Nonrelativistic Lattice QCD
• A Precise Determination of ${\alpha }_s$ from Lattice QCD
• A New Determination of M_b Using Lattice QCD
• What is Renormalization?

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