Quantum Monte Carlo calculations in configuration space with three-nucleon forces

Quantum Monte Carlo calculations in configuration space with three-nucleon forces
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三核子力配置空间中的量子蒙特卡罗计算

DOI:
10.1103/physrevc.107.044303
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发表时间:
2023
期刊:
影响因子:
3.1
通讯作者:
Arthuis P
Arthuis P
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Arthuis P

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中子物质,通过它与中子星以及冷原子气体等系统的联系,是核物理中最有趣但可计算的系统之一。组态相互作用蒙特卡罗(CIMC)方法是一种随机多体技术,使我们能够处理强耦合系统。与核物理中使用的其他量子蒙特卡罗方法相比,CIMC方法可以直接在动量空间中制定,从而有效地利用非局域相互作用。在这项工作中,我们扩展CIMC方法,包括通过正常有序两体近似的三核子相互作用。我们目前的结果中子物质的状态方程与其他多体计算,采用低分辨率的手征相互作用,并提供预测的动量分布和静态结构因子。
Neutron matter, through its connection to neutron stars as well as systems such as cold atom gases, is one of the most interesting yet computationally accessible systems in nuclear physics. The configuration-interaction Monte Carlo (CIMC) method is a stochastic many-body technique allowing us to tackle strongly coupled systems. In contrast to other quantum Monte Carlo methods employed in nuclear physics, the CIMC method can be formulated directly in momentum space allowing for an efficient use of nonlocal interactions. In this work we extend CIMC method to include three-nucleon interactions through the normal-ordered two-body approximation. We present results for the equation of state of neutron matter in line with other many-body calculations that employ low-resolution chiral interactions, and provide predictions for the momentum distribution and the static structure factor.
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