Transport properties of nuclear pasta phase with quantum molecular dynamics

Abstract

We study the transport properties of nuclear pasta for a wide range of density, temperature and proton fractions, relevant for different astrophysical scenarios adopting a quantum molecular dynamics model. In particular, we estimate the values of shear viscosity as well as electrical and thermal conductivities by calculating the static structure factor $S(q)$ using simulation data. In the density and temperature range where the pasta phase appears, the static structure factor shows irregular behavior. The presence of a slab phase greatly enhances the peak in $S(q)$. However, the effect of irregularities in $S(q)$ on the transport coefficients is not very dramatic. The values of all three transport coefficients are found to have the same orders of magnitude as found in theoretical calculations for the inner crust matter of neutron stars without the pasta phase and therefore, is in contrast to earlier speculations that a pasta layer might be highly resistive, both thermally and electrically.

arXiv commentversion accepted in ApJ

References in corpus (25)

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Cited by in corpus (22)

• The Science of the Einstein Telescope
• Nuclear Physics of the Outer Layers of Accreting Neutron Stars
• Warming Nuclear Pasta with Dark Matter: Kinetic and Annihilation Heating of Neutron Star Crusts
• Magneto-thermal evolution of neutron stars with coupled Ohmic, Hall and ambipolar effects via accurate finite-volume simulations
• Domains and defects in nuclear "pasta"
• Glassy quantum nuclear pasta in neutron star crusts
• Role of crustal physics in the tidal deformation of a neutron star
• Bulk viscosity in a neutron star mantle
• A Survey of Nuclear Pasta in the Intermediate Density Regime: Structure Functions for Neutrino Scattering
• Pasta fluctuations in symmetric matter at finite temperature
• Thermal Fluctuations in Nuclear Pasta
• Gapless neutron superfluidity can explain the late time cooling of transiently accreting neutron stars
• Application of superconducting-superfluid magnetohydrodynamics to nuclear "pasta" in neutron stars
• Anisotropic electron transport in the nuclear pasta phase
• Proton superconductivity in pasta phases in neutron star crusts
• Fluctuations in the pasta phase
• Crust Cooling Models are Insensitive to the Crust-Core Transition Pressure for Realistic Equations of State
• Elasticity of neutron star mantle: improved compressible liquid drop model for cylindrical phases
• Gapless neutron superfluidity in the crust of the accreting neutron stars KS 1731-260 and MXB 1659-29
• Characterization of the inner edge of the neutron star crust
• Continuous gravitational waves from thermal mountains on accreting neutron stars: effect of the nuclear pasta phase
• Existence of a supersymmetric extension of the gauged non-linear $\Sigma$-model and the transition from integrability to chaos