Thermal Fluctuations in Nuclear Pasta. (arXiv:2005.04766v2 [nucl-th] UPDATED)

<a href="http://arxiv.org/find/nucl-th/1/au:+Caplan_M/0/1/0/all/0/1">M. E. Caplan</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Forsman_C/0/1/0/all/0/1">C. R. Forsman</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Schneider_A/0/1/0/all/0/1">A. S. Schneider</a>

Despite their astrophysical relevance, nuclear pasta phases are relatively

unstudied at high temperatures. We present molecular dynamics simulations of

symmetric nuclear matter with several topologies of `lasagna’ at a range of

temperatures to study the pasta-uniform transition. Using the Minkowski

functionals we quantify trends in the occupied volume, surface area, mean

breadth, and Euler characteristic. The amplitude of surface displacements of

the pasta increase with temperature which produce short lived topological

defects such as holes and filaments near melting, resulting in power laws for

increasing surface curvature with temperature. We calculate the static

structure factor and report the shear viscosity and thermal conductivity of

pasta, finding that the shear viscosity is minimized at the melting

temperature. These results may have implications for the thermoelastic

properties of nuclear pasta and finite temperature corrections to the equation

of state at pasta densities.

Despite their astrophysical relevance, nuclear pasta phases are relatively

unstudied at high temperatures. We present molecular dynamics simulations of

symmetric nuclear matter with several topologies of `lasagna’ at a range of

temperatures to study the pasta-uniform transition. Using the Minkowski

functionals we quantify trends in the occupied volume, surface area, mean

breadth, and Euler characteristic. The amplitude of surface displacements of

the pasta increase with temperature which produce short lived topological

defects such as holes and filaments near melting, resulting in power laws for

increasing surface curvature with temperature. We calculate the static

structure factor and report the shear viscosity and thermal conductivity of

pasta, finding that the shear viscosity is minimized at the melting

temperature. These results may have implications for the thermoelastic

properties of nuclear pasta and finite temperature corrections to the equation

of state at pasta densities.

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