Local spectral density of an interacting one-dimensional Bose gas with an impurity
arXiv:2106.11834 · doi:10.1103/PhysRevA.105.043305
Abstract
A weakly interacting Bose gas with a single static impurity is studied in one dimension. The local spectral density is evaluated and an analytic expression valid for positive strengths of the impurity coupling to the bosons, at all distances and at all frequencies is obtained using the Bogoliubov-de Gennes approximation.
arXiv comment14 pages, 4 figures
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