Quantum simulations of nuclei and nuclear pasta with the multiresolution adaptive numerical environment for scientific simulations
Abstract
Neutron star and supernova matter at densities just below the nuclear matter saturation density is expected to form a lattice of exotic shapes. These so-called nuclear pasta phases are caused by Coulomb frustration. Their elastic and transport properties are believed to play an important role for thermal and magnetic field evolution, rotation, and oscillation of neutron stars. Furthermore, they can impact neutrino opacities in core-collapse supernovae. In this work, we present proof-of-principle three-dimensional (3D) Skyrme Hartree-Fock (SHF) simulations of nuclear pasta with the Multi-resolution ADaptive Numerical Environment for Scientific Simulations (MADNESS). We perform benchmark studies of 16O, 208Pb, and 238U nuclear ground states and calculate binding energies via 3D SHF simulations. Results are compared with experimentally measured binding energies as well as with theoretically predicted values from an established SHF code. The nuclear pasta simulation is initialized in the so-called waffle geometry as obtained by the Indiana University Molecular Dynamics (IUMD) code. The size of the unit cell is 24 fm with an average density of about ρ = 0.05fm-3, proton fraction of Yp = 0.3, and temperature of T = 0 MeV. Overall, our calculations reproduce the binding energies and shapes of light and heavy nuclei with different geometries.more »
- Authors:
-
- Indiana Univ., Bloomington, IN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1787948
- Alternate Identifier(s):
- OSTI ID: 1252118
- Grant/Contract Number:
- AC05-00OR22725; FG02-87ER40365; SC0008808
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 5; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear astrophysics; nuclear forces; nuclear matter in neutron stars; molecular dynamics; nuclear density functional theory
Citation Formats
Sagert, I., Fann, G. I., Fattoyev, F. J., Postnikov, S., and Horowitz, C. J. Quantum simulations of nuclei and nuclear pasta with the multiresolution adaptive numerical environment for scientific simulations. United States: N. p., 2016.
Web. doi:10.1103/physrevc.93.055801.
Sagert, I., Fann, G. I., Fattoyev, F. J., Postnikov, S., & Horowitz, C. J. Quantum simulations of nuclei and nuclear pasta with the multiresolution adaptive numerical environment for scientific simulations. United States. https://doi.org/10.1103/physrevc.93.055801
Sagert, I., Fann, G. I., Fattoyev, F. J., Postnikov, S., and Horowitz, C. J. Mon .
"Quantum simulations of nuclei and nuclear pasta with the multiresolution adaptive numerical environment for scientific simulations". United States. https://doi.org/10.1103/physrevc.93.055801. https://www.osti.gov/servlets/purl/1787948.
@article{osti_1787948,
title = {Quantum simulations of nuclei and nuclear pasta with the multiresolution adaptive numerical environment for scientific simulations},
author = {Sagert, I. and Fann, G. I. and Fattoyev, F. J. and Postnikov, S. and Horowitz, C. J.},
abstractNote = {Neutron star and supernova matter at densities just below the nuclear matter saturation density is expected to form a lattice of exotic shapes. These so-called nuclear pasta phases are caused by Coulomb frustration. Their elastic and transport properties are believed to play an important role for thermal and magnetic field evolution, rotation, and oscillation of neutron stars. Furthermore, they can impact neutrino opacities in core-collapse supernovae. In this work, we present proof-of-principle three-dimensional (3D) Skyrme Hartree-Fock (SHF) simulations of nuclear pasta with the Multi-resolution ADaptive Numerical Environment for Scientific Simulations (MADNESS). We perform benchmark studies of 16O, 208Pb, and 238U nuclear ground states and calculate binding energies via 3D SHF simulations. Results are compared with experimentally measured binding energies as well as with theoretically predicted values from an established SHF code. The nuclear pasta simulation is initialized in the so-called waffle geometry as obtained by the Indiana University Molecular Dynamics (IUMD) code. The size of the unit cell is 24 fm with an average density of about ρ = 0.05fm-3, proton fraction of Yp = 0.3, and temperature of T = 0 MeV. Overall, our calculations reproduce the binding energies and shapes of light and heavy nuclei with different geometries. For the pasta simulation, we find that the final geometry is very similar to the initial waffle state. We compare calculations with and without spin-orbit forces. We find that while subtle differences are present, the pasta phase remains in the waffle geometry. Within the MADNESS framework, we can successfully perform calculations of inhomogeneous nuclear matter. By using pasta configurations from IUMD it is possible to explore different geometries and test the impact of self-consistent calculations on the latter.},
doi = {10.1103/physrevc.93.055801},
journal = {Physical Review C},
number = 5,
volume = 93,
place = {United States},
year = {Mon May 09 00:00:00 EDT 2016},
month = {Mon May 09 00:00:00 EDT 2016}
}
Web of Science
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