One-boson scattering processes in the massive Spin-Boson model
One-boson scattering processes in the massive Spin-Boson model
复制标题
大规模自旋玻色子模型中的单玻色子散射过程
DOI:
10.1016/j.jmaa.2020.124094
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发表时间:
2020
影响因子:
1.3
通讯作者:
F. Hänle
中科院分区:
文献类型:
--
作者:
M. Ballesteros;D.- A. Deckert;J. Faupin;F. Hänle
The Spin-Boson model describes a two-level quantum system that interacts with a second-quantized boson scalar field. Recently the relation between the integral kernel of the scattering matrix and the resonance in this model has been established in [18] for the case of massless bosons. In the present work, we treat the massive case. On the one hand, one might rightfully expect that the massive case is easier to handle since, in contrast to the massless case, the corresponding Hamiltonian features a spectral gap. On the other hand, it turns out that the non-zero boson mass introduces a new complication as the spectrum of the complex dilated, free Hamiltonian exhibits lines of spectrum attached to every multiple of the boson rest mass energy starting from the ground and excited state energies. This leads to an absence of decay of the corresponding complex dilated resolvent close to the real line, which, in [18], was a crucial ingredient to control the time evolution in the scattering regime. With the new strategy presented here, we provide a proof of an analogous formula for the scattering kernel as compared to the massless case and use the opportunity to provide the required spectral information by a Mourre theory argument combined with a suitable application of the Feshbach-Schur map instead of complex dilation.
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影响因子:
2.4
作者:
M. Ballesteros;D.-A. Deckert;F. Hänle
通讯作者:
F. Hänle
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Pizzo
通讯作者:
A. Pizzo
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
A. Pizzo
通讯作者:
A. Pizzo
影响因子:
1.1
作者:
W. A. Salem;J. Faupin;J. Fröhlich;I. Sigal
通讯作者:
I. Sigal
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
M. Hübner;H. Spohn
通讯作者:
H. Spohn