1 | In this paper, the logarithmic perturbation scheme for the central potential field is investigated. | |
2 | With the time-dependent perturbation theory, the dynamics of a two-level system coupled to an Bose field is revisited. | |
3 | In the paper, we study the quantum fluctuations of charge and electric current in mesoscopic LC circuit by using the theory of time-dependent perturbation. | |
4 | Chiral Perturbation Theory (CHPT), as a low-energy effective field theory based on QCD, is a powerful tool in the investigation of the nuclear and particle physics. | |
5 | From a view point of the transformation of representation, we analyse the process of the time independent perturbation, and give a unified scheme for the cases of degeneracy and non degeneracy. |