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arXiv · 1007.0969

Smoothness and analyticity of perturbation expansions in QED

David Hasler·Ira Herbst
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Abstract

We consider the ground state of an atom in the framework of non-relativistic qed. We assume that the ultraviolet cutoff is of the order of the Rydberg energy and that the atomic Hamiltonian has a non-degenerate ground state. We show that the ground state energy and the ground state are k-times continuously differentiable functions of the fine structure constant and respectively the square root of the fine structure constant on some nonempty interval [0,c_k).

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David Hasler, Ira Herbst. 2010-09-04. Smoothness and analyticity of perturbation expansions in QED. https://arxiv.org/abs/1007.0969

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