MISC

査読有り
2016年

Nuclear Pasta at Finite Temperature with the Time-Dependent Hartree-Fock Approach

NUCLEAR PHYSICS IN ASTROPHYSICS VI (NPA6)
  • B. Schuetrumpf
  • ,
  • M. A. Klatt
  • ,
  • K. Iida
  • ,
  • J. A. Maruhn
  • ,
  • K. Mecke
  • ,
  • P-G Reinhard

665
記述言語
英語
掲載種別
DOI
10.1088/1742-6596/665/1/012074
出版者・発行元
IOP PUBLISHING LTD

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 a 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 p-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.

Web of Science ® 被引用回数 : 2

リンク情報
DOI
https://doi.org/10.1088/1742-6596/665/1/012074
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000368236600074&DestApp=WOS_CPL

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