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. (C) 2001 John Wiley & Sons, Inc. [References: 32]
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机译：我们研究了将量子化学技术与QED相结合的方法。在我们的理论中，我们在平等的基础上对待N电子系统和Dirac海。我们将它们都视为多体系统的动态自由度。在引入我们的QED-SCF方法之后，根据诸如时间反转，奇偶校验和O（3）旋转对称性之类的组理论运算对QED-SCF解决方案进行分类。一般QED-SCF解的自然轨道是通过对角化一阶密度矩阵来确定的。因此，我们获得了通过量子化学方法（例如QED-MCSCF和QED耦合簇方法）在强QED作用下处理系统的可能性。 （C）2001 John Wiley＆Sons，Inc. [参考：32]
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