Ab initio multireference in-medium similarity renormalization group calculations of even calcium and nickel isotopes

H. Hergert; S. K. Bogner; T. D. Morris; S. Binder; A. Calci; J. Langhammer; R. Roth

doi:10.1103/PhysRevC.90.041302

Ab initio multireference in-medium similarity renormalization group calculations of even calcium and nickel isotopes

H. Hergert, S. K. Bogner, T. D. Morris, S. Binder, A. Calci, J. Langhammer, R. Roth

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107 Scopus citations

Abstract

We use the newly developed multireference in-medium similarity renormalization group to study all even isotopes of the calcium and nickel isotopic chains, based on two- plus three-nucleon interactions derived from chiral effective field theory. We present results for ground-state and two-neutron separation energies and quantify their theoretical uncertainties. At shell closures, we find excellent agreement with coupled-cluster results obtained with the same Hamiltonians. Our results confirm the importance of chiral 3N interactions to obtain a correct reproduction of experimental energy trends, and their subtle impact in neutron-rich Ca and Ni isotopes. At the same time, we uncover and discuss deficiencies of the input Hamiltonians which need to be addressed by the next generation of chiral interactions.

Original language	English
Article number	041302
Journal	Physical Review C - Nuclear Physics
Volume	90
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.90.041302
State	Published - Oct 23 2014
Externally published	Yes

Funding

Funders	Funder number
U.S. Department of Energy	DE-AC02-05CHH11231
Directorate for Mathematical and Physical Sciences	1306250, 1068648, 1404159

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10.1103/PhysRevC.90.041302

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title = "Ab initio multireference in-medium similarity renormalization group calculations of even calcium and nickel isotopes",

abstract = "We use the newly developed multireference in-medium similarity renormalization group to study all even isotopes of the calcium and nickel isotopic chains, based on two- plus three-nucleon interactions derived from chiral effective field theory. We present results for ground-state and two-neutron separation energies and quantify their theoretical uncertainties. At shell closures, we find excellent agreement with coupled-cluster results obtained with the same Hamiltonians. Our results confirm the importance of chiral 3N interactions to obtain a correct reproduction of experimental energy trends, and their subtle impact in neutron-rich Ca and Ni isotopes. At the same time, we uncover and discuss deficiencies of the input Hamiltonians which need to be addressed by the next generation of chiral interactions.",

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AU - Hergert, H.

AU - Bogner, S. K.

AU - Morris, T. D.

AU - Binder, S.

AU - Calci, A.

AU - Langhammer, J.

AU - Roth, R.

PY - 2014/10/23

Y1 - 2014/10/23

N2 - We use the newly developed multireference in-medium similarity renormalization group to study all even isotopes of the calcium and nickel isotopic chains, based on two- plus three-nucleon interactions derived from chiral effective field theory. We present results for ground-state and two-neutron separation energies and quantify their theoretical uncertainties. At shell closures, we find excellent agreement with coupled-cluster results obtained with the same Hamiltonians. Our results confirm the importance of chiral 3N interactions to obtain a correct reproduction of experimental energy trends, and their subtle impact in neutron-rich Ca and Ni isotopes. At the same time, we uncover and discuss deficiencies of the input Hamiltonians which need to be addressed by the next generation of chiral interactions.

AB - We use the newly developed multireference in-medium similarity renormalization group to study all even isotopes of the calcium and nickel isotopic chains, based on two- plus three-nucleon interactions derived from chiral effective field theory. We present results for ground-state and two-neutron separation energies and quantify their theoretical uncertainties. At shell closures, we find excellent agreement with coupled-cluster results obtained with the same Hamiltonians. Our results confirm the importance of chiral 3N interactions to obtain a correct reproduction of experimental energy trends, and their subtle impact in neutron-rich Ca and Ni isotopes. At the same time, we uncover and discuss deficiencies of the input Hamiltonians which need to be addressed by the next generation of chiral interactions.

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Ab initio multireference in-medium similarity renormalization group calculations of even calcium and nickel isotopes

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