论文标题
基于手性有效田间理论相互作用的有限温度中的中子物质
Neutron matter at finite temperature based on chiral effective field theory interactions
论文作者
论文摘要
我们基于在有限温度下的中子物质状态方程，基于手性有效野外理论中的两种和三核子的相互作用到近代到次要到领先的顺序。自由能，压力，熵和内部能量是使用多体扰动理论计算得出的，其中包括围绕自一致的Hartree-Fock解决方案的术语。我们包括三核相互作用的贡献，而无需采用正常阶近似值，并根据手性膨胀中的逐阶分析提供理论不确定性估计。我们的结果表明，通过热指数和密度依赖性有效质量可以很好地捕获热效应。提出的框架为研究一般温度和与核心偏离超新星和中子星星合并相关的质子分数的状态密集物质方程提供了基础。
We study the equation of state of neutron matter at finite temperature based on two- and three-nucleon interactions derived within chiral effective field theory to next-to-next-to-next-to-leading order. The free energy, pressure, entropy, and internal energy are calculated using many-body perturbation theory including terms up to third order around the self-consistent Hartree-Fock solution. We include contributions from three-nucleon interactions without employing the normal-ordering approximation and provide theoretical uncertainty estimates based on an order-by-order analysis in the chiral expansion. Our results demonstrate that thermal effects can be captured remarkably well via a thermal index and a density-dependent effective mass. The presented framework provides the basis for studying the dense matter equation of state at general temperatures and proton fractions relevant for core-collapse supernovae and neutron star mergers.
