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arXiv · hep-lat/9610015

Comparing Different Improvement Programs for the N-Vector Model

Sergio Caracciolo·Andrea Pelissetto
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Abstract

We discuss the connection between various types of improved actions in the context of the two-dimensional sigma-model. We also discuss spectrum-improved actions showing that these actions do not have any improved behaviour. An O(a^2) on-shell improved action with all couplings defined on a plaquette and satisfying reflection positivity is also explicitly constructed.

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Sergio Caracciolo, Andrea Pelissetto. 1996-10-18. Comparing Different Improvement Programs for the N-Vector Model. https://doi.org/10.1016/s0370-2693(97)00495-4

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