QED-SCF, MCSCF and Coupled-cluster Methods in Quantum Chemistry

QED-SCF, MCSCF and Coupled-cluster Methods in Quantum Chemistry
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量子化学中的 QED-SCF、MCSCF 和耦合簇方法

DOI:
10.1002/qua.10017
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发表时间:
2001
影响因子:
2.2
通讯作者:
K. Yamaguchi
K. Yamaguchi
中科院分区:
化学3区
文献类型:
--
作者:
Tadafumi Ohsaku;K. Yamaguchi

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我们研究了一种将量子化学技术与QED相结合的方法。在我们的理论中,我们把N电子系统和狄拉克海放在同等的地位上,把它们都看作是多体系统的动力学自由度。在介绍了我们的QED-SCF方法之后,我们根据时间反演、宇称和O(3)旋转对称性等群论操作对QED-SCF解进行了分类。通过对角化一阶密度矩阵,确定了一般QED-SCF解的自然轨道。因此,我们得到了用量子化学方法,如QED-MCSCF和QED耦合团簇方法处理强QED效应下系统的可能性。John Wiley & Sons,Inc.国际量子化学杂志,2001年
We investigate a method of combining the techniques of quantum chemistry with QED. In our theory, we treat the N-electron system and the Dirac sea on an equal footing; we regard both of them as the dynamical degrees of freedom of a many-body system. After the introduction of our QED-SCF method, the QED-SCF solutions are classified on the basis of group-theoretical operations such as time-reversal, parity and O(3) rotational symmetry. The natural orbitals of general QED-SCF solutions are determined by diagonalizing the first-order density matrix. Thus, we obtain the possibility of treating the system under strong QED effect by the methods of quantum chemistry, such as QED-MCSCF and QED coupled-cluster approaches. © 2001 John Wiley & Sons, Inc. Int J Quantum Chem, 2001
Sho Yamaguchi:“金属-绝缘体转变中间区域中电荷和/或自旋介导的超导体和光致超导体的可能性”Int.J.Quant.Chem. 65. 947-964 (1997)
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