论文标题
核壳模型中的质子中子纠缠
Proton-neutron entanglement in the nuclear shell model
论文作者
论文摘要
我们计算相互作用的核壳模型中的质子 - 中子纠缠熵，用于多种核素和相互作用。某些结果是直观的，例如，由单粒子和单极能量控制的壳结构强烈影响能量可用的空间，从而影响纠缠熵。我们还发现了一个令人惊讶的结果：当$ n \ neq z $时，低激发能的纠缠熵往往会减少。尽管我们提供了证据，但这是由于物理核力量与随机的两体相互作用形成鲜明对比的，这表明没有这种降低，但确切的机制尚不清楚。但是，低纠缠表明，在富含中子的核素模型中，质子和中子之间的耦合在计算上的要求可能比以前预期的要小。
We compute the proton-neutron entanglement entropy in the interacting nuclear shell model for a variety of nuclides and interactions. Some results make intuitive sense, for example that the shell structure, as governed by single-particle and monopole energies, strongly affects the energetically available space and thus the entanglement entropy. We also find a surprising result: that the entanglement entropy at low excitation energy tends to decrease for nuclides when $N \neq Z$. While we provide evidence this arises from the physical nuclear force by contrasting with random two-body interactions which shows no such decrease, the exact mechanism is unclear. Nonetheless, the low entanglement suggests that in models of neutron-rich nuclides, the coupling between protons and neutrons may be less computationally demanding than one might otherwise expect.
