TY  - JOUR
AU  - Lähde, Timo
AU  - Luu, Tom
AU  - Lee, Dean
AU  - Meissner, Ulf-G.
AU  - Epelbaum, Evgeny
AU  - Krebs, Hermann
AU  - Rupak, Gautam
TI  - Nuclear Lattice Simulations using Symmetry-Sign Extrapolation
JO  - The European physical journal / A
VL  - 51
SN  - 1431-5831
CY  - Berlin
PB  - Springer
M1  - FZJ-2016-00918
SP  - 92
PY  - 2015
N1  - 25 pages, 12 figures
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000358605900001
DO  - DOI:10.1140/epja/i2015-15092-1
UR  - https://juser.fz-juelich.de/record/281219
ER  -