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Communication: A mean field platform for excited state quantum chemistry

机译:通讯:激发态量子化学的平均场平台

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We present a mean field theory for excited states that is broadly analogous to ground state Hartree-Fock theory. Like Hartree-Fock, our approach is deterministic, state-specific, applies a variational principle to a minimally correlated ansatz, produces energy stationary points, relaxes the orbital basis, has a Fock-build cost-scaling, and can serve as the foundation for correlation methods such as perturbation theory and coupled cluster theory. To emphasize this last point, we pair our mean field approach with an excited state analog of second order Moller-Plesset theory and demonstrate that in water, formaldehyde, neon, and stretched lithium fluoride, the resulting accuracy far exceeds that of configuration interaction singles and rivals that of equation of motion coupled cluster. Published by AIP Publishing.
机译:我们为兴奋状态提出了一个平均场地理论,这些理论与地面州Hartree-Fock理论大致类似。 就像Hartree-Fock一样,我们的方法是确定性的,状态特定的,将变分原理应用于一个微小相关的Ansatz,产生能量静止点,放松轨道基础,具有巨石构建成本缩放,可以作为基础 相关方法,如扰动理论和耦合簇理论。 为了强调这一点,我们将我们的平均场方法与二阶Moller-Plesset理论的激发态方法配对,并证明在水,甲醛,氖和拉伸锂氟化锂中,所得到的精度远远超过配置相互作用单打和 对竞争对手的运动耦合集群的等式。 通过AIP发布发布。

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