Self-adjointness and domain of the Frohlich Hamiltonian

Self-adjointness and domain of the Frohlich Hamiltonian
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DOI:
10.1063/1.4941561
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发表时间:
2016-02-01
影响因子:
1.3
通讯作者:
Wuensch, A.
Wuensch, A.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Griesemer, M.;Wuensch, A.

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在Herbert Frohlich的大极化子模型中,电子-声子相互作用在形式意义上是一个小的微扰,在算符意义上是一个大的微扰。这意味着哈密顿量的形式域不受相互作用的影响,但自伴性域受影响。然而,在Frohlich模型的特殊情况下,由于最近公布的一个新的算子界,我们能够用适当的Dressing变换给出域的显式刻画。利用这种Dressing变换的映射性质,我们分析了哈密顿量域中的矢量相对于电子位置的光滑性。(C)2016 AIP出版有限责任公司。
In the large polaron model of Herbert Frohlich, the electron-phonon interaction is a small perturbation in form sense, but a large perturbation in operator sense. This means that the form-domain of the Hamiltonian is not affected by the interaction but the domain of self-adjointness is. In the particular case of the Frohlich model, we are nevertheless able, thanks to a recently published new operator bound, to give an explicit characterization of the domain in terms of a suitable dressing transform. Using the mapping properties of this dressing transform, we analyse the smoothness of vectors in the domain of the Hamiltonian with respect to the position of the electron. (C) 2016 AIP Publishing LLC.