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Study of stochastic estimates of quark loops with unbiased subtraction | | Nilmani Mathur
; Shao-Jing Dong
; | | Date: |
4 Sep 2002 | | Subject: | hep-lat | | Abstract: | Stochastic noise estimator method is a powerful tool to calculate the disconnected insertion involving quark loops. We study the variance reduction technique with unbiased subtraction. We use the complex $Z_2$ noise to calculate the quark loops on a $16^3 imes 24$ lattice with $eta = 6.0$ and $kappa$ = 0.154. Unbiased subtraction method is performed by using hoping parameter expansion. We report on the variance reduction for the point-split vector current as a function of the number of subtraction terms and the number of noise used. | | Source: | arXiv, hep-lat/0209055 | | Services: | Forum | Review | PDF | Favorites | |
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