40 citations · 115 across the 27 of their papers we have counts for
4 papers · 1 filter
Self-Adjoint Extensions of Bipartite Hamiltonians
Daniel Lenz, Timon Weinmann, Melchior Wirth
We compute the deficiency spaces of operators of the form , for symmetric and self-adjoint . This enables us to construct se…
Absence of Absolutely Continuous Spectrum for Generic Quasi-Periodic Schrödinger Operators on the Real Line
David Damanik, Daniel Lenz
We show that a generic quasi-periodic Schrödinger operator in has purely singular spectrum. That is, for any minimal translation flow on a finite-dimensional toru…
Subshifts with leading sequences, uniformity of cocycles and spectra of Schreier graphs
Rostislav Grigorchuk, Daniel Lenz, Tatiana Nagnibeda +1
We introduce a class of subshifts governed by finitely many two-sided infinite words. We call these words leading sequences. We show that any locally constant cocycle over such a s…
Universal lower bounds for Laplacians on weighted graphs
Daniel Lenz, Peter Stollmann
We discuss optimal lower bounds for eigenvalues of Laplacians on weighted graphs. These bounds are formulated in terms of the geometry and, more specifically, the inradius of subse…