Variational Calculations using Low-Momentum Potentials with Smooth Cutoffs
arXiv:nucl-th/0602017 · doi:10.1016/j.physletb.2006.06.037
Abstract
Recent variational calculations of the deuteron and the triton illustrate that simple wave function ansatze become more effective after evolving the nucleon-nucleon potential to lower momentum (``V_lowk''). However, wave function artifacts from the use of sharp cutoffs in relative momentum decrease effectiveness for small cutoffs (< 2 fm^-1) and slow down convergence in harmonic oscillator bases. These sharp cutoff artifacts are eliminated when V_lowk is generated using a sufficiently smooth cutoff regulator.
11 pages, 4 figures
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