Domains and defects in nuclear pasta
Abstract
Nuclear pasta topology is an essential ingredient to determine transport properties in the inner crust of neutron stars. Herein we perform semiclassical molecular dynamics simulations of nuclear pasta for proton fractions and near one-third of nuclear saturation density, , at a temperature . Our simulations are, to our knowledge, the largest nuclear pasta simulations to date and contain up to nucleons in the and nucleons in the case. An algorithm to determine which nucleons are part of a given sub-domain in the system is presented. By comparing runs of different sizes we study finite-size effects, equilibration time, the formation of multiple domains and defects in the pasta structures, as well as the structure factor dependence on simulation size. Although we find qualitative agreement between the topological structure and the structure factors of runs with 51 200 nucleons and those with nucleons or more, we show that simulations with hundreds of thousands of nucleons may be necessary to accurately predict pasta transport properties.
- Authors:
-
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
- McGill Univ., Montreal, QC (Canada)
- Indiana Univ., Bloomington, IN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Indiana Univ., Bloomington, IN (United States); Michigan State Univ., East Lansing, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); Brazilian National Council for Scientific and Technological Development (CNPq); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)
- OSTI Identifier:
- 1565771
- Alternate Identifier(s):
- OSTI ID: 1481231
- Report Number(s):
- arXiv:1807.00102v1
Journal ID: ISSN 2469-9985; PRVCAN
- Grant/Contract Number:
- AC05-00OR22725; FG02-87ER40365; SC0018083; 201432/2014-5; AST-1333520; PHY-1151197
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 98; 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; 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Schneider, A. S., Caplan, M. E., Berry, D. K., and Horowitz, C. J. Domains and defects in nuclear pasta. United States: N. p., 2018.
Web. doi:10.1103/physrevc.98.055801.
Schneider, A. S., Caplan, M. E., Berry, D. K., & Horowitz, C. J. Domains and defects in nuclear pasta. United States. https://doi.org/10.1103/physrevc.98.055801
Schneider, A. S., Caplan, M. E., Berry, D. K., and Horowitz, C. J. Wed .
"Domains and defects in nuclear pasta". United States. https://doi.org/10.1103/physrevc.98.055801. https://www.osti.gov/servlets/purl/1565771.
@article{osti_1565771,
title = {Domains and defects in nuclear pasta},
author = {Schneider, A. S. and Caplan, M. E. and Berry, D. K. and Horowitz, C. J.},
abstractNote = {Nuclear pasta topology is an essential ingredient to determine transport properties in the inner crust of neutron stars. Herein we perform semiclassical molecular dynamics simulations of nuclear pasta for proton fractions Yp=0.30 and Yp=0.40 near one-third of nuclear saturation density, n=0.05fm–3, at a temperature T=1.0MeV. Our simulations are, to our knowledge, the largest nuclear pasta simulations to date and contain up to 3276800 nucleons in the Yp=0.30 and 819200 nucleons in the Yp=0.40 case. An algorithm to determine which nucleons are part of a given sub-domain in the system is presented. By comparing runs of different sizes we study finite-size effects, equilibration time, the formation of multiple domains and defects in the pasta structures, as well as the structure factor dependence on simulation size. Although we find qualitative agreement between the topological structure and the structure factors of runs with 51 200 nucleons and those with 819200 nucleons or more, we show that simulations with hundreds of thousands of nucleons may be necessary to accurately predict pasta transport properties.},
doi = {10.1103/physrevc.98.055801},
journal = {Physical Review C},
number = 5,
volume = 98,
place = {United States},
year = {Wed Nov 07 00:00:00 EST 2018},
month = {Wed Nov 07 00:00:00 EST 2018}
}
Web of Science
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