Field‐Theoretical Approach to Many‐Body Perturbation Theory: Combining MBPT and QED
- Conference date: 25–30 September 2007
- Location: Corfu (Greece)
Many‐Body Perturbation Theory (MBPT) is today highly developed. The electron correlation of atomic and molecular systems can be evaluated to essentially all orders of perturbation theory—also relativistically (RMBPT)—by means of techniques of Coupled‐Cluster type. When high accuracy is needed, effects beyond RMBPT will enter, i.e., effects of retarded Breit interaction and of radiative effects (Lamb shift), effects normally referred to as QED effects. These effects can be evaluated by means of special techniques, like S‐matrix formulation, which cannot simultaneously treat electron correlation. It would for many applications be desirable to have access to a numerical technique, where effects of electron correlation and of QED could be treated on the same footing. Such a technique is presently being developed and gradually implemented at our laboratory. Some numerical results will be given.
- Quantum electrodynamic effects
- Atom irradiation effects
- Electron correlation calculations
- Perturbation theory
- Perturbation methods
- Radiation treatment
- Rotational correlation time
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