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arXiv 1807.00596nucl-thnucl-ex
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核物质液-气相变的微观预测

Microscopic predictions of the nuclear matter liquid-gas phase transition

Arianna Carbone, Artur Polls, Arnau Rios

摘要:

我们提出了第一性原理预测的液-气相变对称核物质采用两个和三个核子手征相互作用。我们的讨论集中在微观量子多体预言中系统误差的来源。一方面,我们测试我们的结果所产生的手征哈密顿量的建设变化的不确定性。我们使用五种不同的手征力与一贯派生的三核子相互作用。另一方面,我们比较了自洽格林函数方法中的阶梯重算与有限温度Brueckner-Hartree-Fock计算。我们发现,系统由于哈密顿主导的多体不确定性。基于这个广泛的计算池,我们估计的临界温度是$T_c=16 \pm 2$兆电子伏,在合理的协议与实验结果。我们还发现,在微观多体模拟中,临界温度和饱和能之间存在很强的相关性。

英文摘要:

We present first-principle predictions for the liquid-gas phase transition in symmetric nuclear matter employing both two- and three-nucleon chiral interactions. Our discussion focuses on the sources of systematic errors in microscopic quantum many body predictions. On the one hand, we test uncertainties of our results arising from changes in the construction of chiral Hamiltonians. We use five different chiral forces with consistently derived three-nucleon interactions. On the other hand, we compare the ladder resummation in the self-consistent Green's functions approach to finite temperature Brueckner--Hartree--Fock calculations. We find that systematics due to Hamiltonians dominate over many-body uncertainties. Based on this wide pool of calculations, we estimate that the critical temperature is $T_c=16 \pm 2$ MeV, in reasonable agreement with experimental results. We also find that there is a strong correlation between the critical temperature and the saturation energy in microscopic many-body simulations.

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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