论文标题
如何将耦合群集理论重归一致
How to renormalize coupled cluster theory
论文作者
论文摘要
耦合群集理论是解决量子多体问题的有吸引力的工具，因为其单打和双倍（CCSD）近似值是计算负担得起的，并且约为相关能量的90％。捕获剩余的10％，例如通过包含三元组，在数字上是昂贵的。在这里，我们假设短距离三体相关性占主导地位和 - 在麻风病[如何重新归一化schrödinger方程，arxiv：nucl-th/9706029] - 可以通过重新纳入三体接触相互作用来包括CCSD中的效果。我们在$^{16} $ o中重新统治了此联系人，并获得$^{24} $ O，$^{20-34} $ ne，$^{40,48} $ ca，$^{78} $ ni，$ ni，$ ni，$ ni，$^{90} $ zr zr，以及$ zr zr，以及$ zr，and $^ni} $ sn。
Coupled cluster theory is an attractive tool to solve the quantum many-body problem because its singles and doubles (CCSD) approximation is computationally affordable and yields about 90% of the correlation energy. Capturing the remaining 10%, e.g. via including triples, is numerically expensive. Here we assume that short-range three-body correlations dominate and - following Lepage [How to renormalize the Schrödinger equation, arXiv:nucl-th/9706029] - that their effects can be included within CCSD by renormalizing the three-body contact interaction. We renormalize this contact in $^{16}$O and obtain accurate CCSD results for $^{24}$O, $^{20-34}$Ne, $^{40,48}$Ca, $^{78}$Ni, $^{90}$Zr, and $^{100}$Sn.
