Nonperturbative approach to the Hubbard model in C60 cluster
J. Gonzalez, J. V. Alvarez
TL;DR
This paper introduces a computational method for analyzing the Hubbard model in C60 clusters by sequentially activating interactions, enabling efficient calculation of charging energies with controlled approximations.
Contribution
It presents a novel sequential interaction scheme for the Hubbard model in C60, improving computational efficiency and accuracy for intermediate interaction strengths.
Findings
Effective calculation of charging energies in C60 clusters
Moderate errors within a specific interaction range
Applicable to low-energy state truncations
Abstract
We propose a computational scheme for the Hubbard model in the C60 cluster in which the interaction with the Fermi sea of charges added to the neutral molecule is switched on sequentially. This is applied to the calculation of the balance of charging energies, within a low-energy truncation of the space of states which produces moderate errors for an intermediate range of the interaction strength.
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