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arXiv 0706.0833math-phmath.MP
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自旋为1/2的Pauli-Fierz模型的泛函积分表示

Functional Integral Representation of the Pauli-Fierz Model with Spin 1/2

Fumio Hiroshima, Jozsef Lorinczi

摘要:

导出了与量子化辐射场有关的Lévy和无限维高斯随机过程的Feynman-Kac型公式。特别地,构造了非相对论量子电动力学中由具有自旋$\han$的Pauli-Fierz哈密顿量生成的$e^{-t\PF}$的泛函积分表示.当不施加外势时,$\PF$变成平移不变量,并分解为直接积分$\PF = \int_\BR^\oplus \PF(P) dP$。给出了$e^{-t\PF(P)}$的泛函积分表示。虽然所有这些哈密顿量都包含自旋,但是对于路径测度得到的核是标量的而不是矩阵表达式。作为泛函积分表示的一个应用,导出了能量比较不等式。

英文摘要:

A Feynman-Kac-type formula for a Lévy and an infinite dimensional Gaussian random process associated with a quantized radiation field is derived. In particular, a functional integral representation of $e^{-t\PF}$ generated by the Pauli-Fierz Hamiltonian with spin $\han$ in non-relativistic quantum electrodynamics is constructed. When no external potential is applied $\PF$ turns translation invariant and it is decomposed as a direct integral $\PF = \int_\BR^\oplus \PF(P) dP$. The functional integral representation of $e^{-t\PF(P)}$ is also given. Although all these Hamiltonians include spin, nevertheless the kernels obtained for the path measures are scalar rather than matrix expressions. As an application of the functional integral representations energy comparison inequalities are derived.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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