Isolated zeros in the spectral function as signature of a quantum continuum
Strongly Correlated Electrons
2019-05-01 v2 Mesoscale and Nanoscale Physics
High Energy Physics - Theory
Abstract
We study the observable properties of quantum systems which involve a quantum continuum as a subpart. We show in a very general way that in any system, which consists of at least two isolated states coupled to a continuum, the spectral function of one of the states exhibits an isolated zero at the energy of the other state. Several examples of quantum systems exhibiting such isolated zeros are discussed. Although very general, this phenomenon can be particularly useful as an indirect detection tool for the continuum spectrum in the lab realizations of quantum critical behavior.
Keywords
Cite
@article{arxiv.1810.10429,
title = {Isolated zeros in the spectral function as signature of a quantum continuum},
author = {Nikolay Gnezdilov and Alexander Krikun and Koenraad Schalm and Jan Zaanen},
journal= {arXiv preprint arXiv:1810.10429},
year = {2019}
}
Comments
10 pages, 6 figures; Published version