Dynamical HISQ - University of Glasgow

Dynamical HISQ - University of Glasgow Dynamical HISQ - University of Glasgow

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HISQ and the MILC code Plaquette test of MILC code versus Kit’s code. Tested Alexei’s MILC inverter against Eduardo’s on 4 3 8 lattice. Doug Toussaint used HISQ inverter on 1/8 fm configs by computing the pion spectrum on an ensemble (m l /m s 0.010/0.050). Good agreement with HPQCD results. MILC will write new optimized versions of the HISQ routines, as more runs are done. Dynamical HISQ – p. 6

RHMC detM α = ∫ Dφ † Dφe −φ† r 2 (M)φ where r(x) = x −α/2 (rational approximation). RHMC is an exact algorithm, also allows larger δt than R algorithm ( δt ∼ 2/3m l ) so is faster (Kennedy/Clark claim 7 times better). MILC are now using the exact RHMC/RHMD algorithm for generating configurations (talk at ILDG11). Dynamical HISQ – p. 7

<strong>HISQ</strong> and the MILC code<br />

Plaquette test <strong>of</strong> MILC code versus Kit’s code.<br />

Tested Alexei’s MILC inverter against<br />

Eduardo’s on 4 3 8 lattice.<br />

Doug Toussaint used <strong>HISQ</strong> inverter on 1/8 fm<br />

configs by computing the pion spectrum on<br />

an ensemble (m l /m s 0.010/0.050). Good<br />

agreement with HPQCD results.<br />

MILC will write new optimized versions <strong>of</strong> the<br />

<strong>HISQ</strong> routines, as more runs are done.<br />

<strong>Dynamical</strong> <strong>HISQ</strong> – p. 6

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