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Comment on "Ab Initio study of 40-Ca with an importance-truncated no-core shell model"
D. J. Dean, G. Hagen, M. Hjorth-Jensen +2
In a recent Letter [Phys. Rev. Lett. 99, 092501 (2007)], Roth and Navratil present an importance-truncation scheme for the no-core shell model. The authors claim that their truncat…
Benchmark calculations for 3H, 4He, 16O and 40Ca with ab-initio coupled-cluster theory
G. Hagen, D. J. Dean, M. Hjorth-Jensen +2
We present ab-initio calculations for 3H, 4He, 16O, and 40Ca based on two-nucleon low-momentum interactions Vlowk within coupled-cluster theory. For 3H and 4He, our results are wit…
Coupled-cluster theory for three-body Hamiltonians
G. Hagen, T. Papenbrock, D. J. Dean +4
We derive coupled-cluster equations for three-body Hamiltonians. The equations for the one- and two-body cluster amplitudes are presented in a factorized form that leads to an effi…
Random Matrices and Chaos in Nuclear Spectra
T. Papenbrock, H. A. Weidenmueller
We speak of chaos in quantum systems if the statistical properties of the eigenvalue spectrum coincide with predictions of random-matrix theory. Chaos is a typical feature of atomi…