Nuclear Pasta at Finite Temperature with the Time-Dependent Hartree-Fock Approach
Schuetrumpf B, Klatt M, Iida K, Maruhn JA, Mecke K, Reinhard PG (2016)
Publication Type: Conference contribution
Publication year: 2016
Publisher: Institute of Physics Publishing
Book Volume: 665
Conference Proceedings Title: Journal of Physics: Conference Series
Event location: Lisbon, PRT
DOI: 10.1088/1742-6596/665/1/012074
Abstract
We present simulations of neutron-rich matter at sub-nuclear densities, like supernova matter. With the time-dependent Hartree-Fock approximation we can study the evolution of the system at temperatures of several MeV employing a full Skyrme interaction in a periodic three-dimensional grid [1]. The initial state consists of α particles randomly distributed in space that have a Maxwell-Boltzmann distribution in momentum space. Adding a neutron background initialized with Fermi distributed plane waves the calculations reflect a reasonable approximation of astrophysical matter. The matter evolves into spherical, rod-like, connected rod-like and slab-like shapes. Further we observe gyroid-like structures, discussed e.g. in [2], which are formed spontaneously choosing a certain value of the simulation box length. The ρ-T-map of pasta shapes is basically consistent with the phase diagrams obtained from QMD calculations [3]. By an improved topological analysis based on Minkowski functionals [4], all observed pasta shapes can be uniquely identified by only two valuations, namely the Euler characteristic and the integral mean curvature. In addition we propose the variance in the cell-density distribution as a measure to distinguish pasta matter from uniform matter.
Authors with CRIS profile
Michael Klatt
Lehrstuhl für Theoretische Physik
Klaus Mecke
Lehrstuhl für Theoretische Physik
Paul-Gerhard Reinhard
Naturwissenschaftliche Fakultät
Involved external institutions
Germany (DE)
Japan (JP)How to cite
APA:
Schuetrumpf, B., Klatt, M., Iida, K., Maruhn, J.A., Mecke, K., & Reinhard, P.-G. (2016). Nuclear Pasta at Finite Temperature with the Time-Dependent Hartree-Fock Approach. In Journal of Physics: Conference Series. Lisbon, PRT: Institute of Physics Publishing.
MLA:
Schuetrumpf, B., et al. "Nuclear Pasta at Finite Temperature with the Time-Dependent Hartree-Fock Approach." Proceedings of the 6th Nuclear Physics in Astrophysics, NPA 2013, Lisbon, PRT Institute of Physics Publishing, 2016.
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