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arXiv 1012.4464nucl-thcond-mat.quant-gas
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自旋极化低密度中子物质

Spin-polarized low-density neutron matter

Alexandros Gezerlis

摘要:

低密度中子物质与富中子核和中子星壳的研究有关。非极化中子物质已经被广泛研究了几十年,而实验指导最近开始出现在超冷原子气体领域。在这项工作中,我们研究人口不平衡的中子物质(可能相关的磁星和核的密度泛函)应用量子蒙特卡罗方法,已被证明是成功的冷原子领域。我们首次报道了超流低密度极化中子物质的从头算模拟。对于小的不平衡的系统,我们发现一个线性依赖的能量上的极化,比例系数依赖于密度。我们还提出了两个费米子组件的动量和对分布的结果。

英文摘要:

Low-density neutron matter is relevant to the study of neutron-rich nuclei and neutron star crusts. Unpolarized neutron matter has been studied extensively over a number of decades, while experimental guidance has recently started to emerge from the field of ultracold atomic gases. In this work, we study population-imbalanced neutron matter (possibly relevant to magnetars and to density functionals of nuclei) applying a Quantum Monte Carlo method that has proven successful in the field of cold atoms. We report on the first ab initio simulations of superfluid low-density polarized neutron matter. For systems with small imbalances, we find a linear dependence of the energy on the polarization, the proportionality coefficient being dependent on the density. We also present results for the momentum and pair distributions of the two fermionic components.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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