QED-SCF, MCSCF and Coupled-cluster Methods in Quantum Chemistry
QED-SCF, MCSCF and Coupled-cluster Methods in Quantum Chemistry
复制标题
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
中科院分区:
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作者:
Tadafumi Ohsaku;K. Yamaguchi
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
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