- 12-59 Asao Arai
- Derivation of the Lamb Shift from an Effective Hamiltonian
in Non-relativistic Quantum Electrodynamics
(226K, Latex 2e)
May 16, 12
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Abstract. Some aspects of spectral analysis of an effective Hamiltonian
in non-relativistic quantum electrodynamics are reviewed.
The Lamb shift of a hydrogen-like atom is derived as the lowest order approximation (in the fine structure
of an energy level shift of the effective Hamiltonian. Moreover,
a general class of effective operators
is presented, which comes from models of an abstract quantum system interacting with a Bose field.