Properties of infrared extrapolations in a harmonic oscillator basis
arXiv:1408.0738 · doi:10.1142/S0218301316410111
Abstract
We continue our studies of infrared (ir) and ultraviolet (uv) regulators of no-core shell model calculations. We extend our results that an extrapolation in the ir cutoff with the uv cutoff above the intrinsic uv scale of the interaction is quite successful, not only for the eigenstates of the Hamiltonian but also for expectation values of operators considered long range. The latter results are obtained with Hamiltonians transformed by the similarity renormalization group (SRG) evolution. On the other hand, a suggested extrapolation in the uv cutoff when the ir cutoff is below the intrinsic ir scale is neither robust nor reliable.
replaced with the version published in a special issue on "Effective Field theories for Nuclear Physics" of International Journal of Modern Physics E, includes further discussion of the running of the radius with the ir regulator, conclusions unchanged
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