On the ionization energy of the semi-relativistic Pauli-Fierz model for a single particle

Details On the ionization energy of the semi-relativistic Pauli-Fierz model for a single particle On the ionization energy of the semi-relativistic Pauli-Fierz model for a single particle

2010-03-08

arxiv.org/abs/1003.1661v4

Physics

Mathematical Physics

8 pages, 0 figures

Scientific paper

A semi-relativistic Pauli-Fierz model is defined by the sum of the free Hamiltonian $H_{\rm f}$ of a Boson Fock space, an nuclear potential $V$ and a relativistic kinetic energy: $$ H=\sqrt{[\sigma\cdot(\mathbf{p}+e\mathbf{A})]^2+M^2} - M + V + H_{\rm f}. $$ Let $-e_0<0$ be the ground state energy of a semi-relativistic Schr\"odinger operator $$ H_{\rm p}=\sqrt{\mathbf{p}^2+M^2} - M + V. $$ It is shown that the ionization energy $E^{\rm ion}$ of $H$ satisfies $$E^{\rm ion}\geq e_0>0$$ for all values of both of the coupling constant $e\in\mathbb{R}$ and the rest mass $M\geq 0$. In particular our result includes the case of M=0.

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