This title appears in the Scientific Report : 2015 

Nuclear Lattice Simulations using Symmetry-Sign Extrapolation
Lähde, Timo (Corresponding author)
Luu, Tom / Lee, Dean / Meissner, Ulf-G. / Epelbaum, Evgeny / Krebs, Hermann / Rupak, Gautam
Theorie der starken Wechselwirkung; IKP-3
Theorie der Starken Wechselwirkung; IAS-4
The @European physical journal / A, 51 (2015) S. 92
Berlin Springer 2015
10.1140/epja/i2015-15092-1
Journal Article
Nuclear Physics from Quantum Chromodynamics
Study of Strongly Interacting Matter
Symmetries and the Emergence of Structure in QCD
Computational Science and Mathematical Methods
OpenAccess
OpenAccess
Please use the identifier: http://dx.doi.org/10.1140/epja/i2015-15092-1 in citations.
Please use the identifier: http://hdl.handle.net/2128/13247 in citations.
Projection Monte Carlo calculations of lattice Chiral Effective Field Theory suffer from sign oscillations to a varying degree dependent on the number of protons and neutrons. Hence, such studies have hitherto been concentrated on nuclei with equal numbers of protons and neutrons, and especially on the alpha nuclei where the sign oscillations are smallest. Here, we introduce the 'symmetry-sign extrapolation' method, which allows us to use the approximate Wigner SU(4) symmetry of the nuclear interaction to systematically extend the Projection Monte Carlo calculations to nuclear systems where the sign problem is severe. We benchmark this method by calculating the ground-state energies of the $^{12}$C, $^6$He and $^6$Be nuclei, and discuss its potential for studies of neutron-rich halo nuclei and asymmetric nuclear matter.