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arXiv 0905.1006math-phmath.MP
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量子电动力学中一个模型的非相对论极限

On the non-relativistic limit of a model in quantum electrodynamics

Edgardo Stockmeyer

摘要:

本文考虑自旋为1/2的(半)相对论粒子与量子化辐射的相互作用。哈密顿量的形式为$\hat{H}_c^V:=\{c^2[(\mathbf{p}+{\bf A})^2+{\bf σ}\cdot{\bf B}]+(mc^2)^2\}^{1/2}-mc^2+V+H_f$。假设势$|V|$相对于动量$|\mathbf{p}|$有界,我们证明了当光速$c$趋向于$\infty$时,$\hat{H}_c^V$在范数预解式意义下收敛于通常的Pauli-Fierz算子.

英文摘要:

We consider a (semi-)relativistic spin-1/2 particle interacting with quantized radiation. The Hamiltonian has the form $\hat{H}_c^V:=\{c^2[(\mathbf{p}+{\bf A})^2+{\bf σ}\cdot{\bf B}]+(mc^2)^2\}^{1/2}-mc^2+V+H_f$. Assuming that the potential $|V|$ is bounded with respect to the momentum $|\mathbf{p}|$, we show that $\hat{H}_c^V$ converges in norm-resolvent sense to the usual Pauli-Fierz operator when $c$, the speed of light, tends to $\infty$.

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