5 citations · 6 across the 5 of their papers we have counts for
5 papers
Uncertainty principles and lower bounds for Schrödinger operators
Albrecht Böttcher, Peter Stollmann, Martin Tautenhahn
We prove that two different abstract quantitative uncertainty principles are equivalent to the strict positivity of the associated abstract Schrö\-din\-ger operators. We also discu…
The wanted extension of Fujii and Tsurumaru's formula for the spectral radius of the Bell-CHSH operator
Albrecht Böttcher, Ilya M. Spitkovsky
This paper is motivated by a recent paper of Yuki Fujii and Toyohiro Tsurumaru in which they established a beautiful formula for the spectral radius of the Bell-CHSH operator on fi…
Similarity between two projections
Albrecht Boettcher, Barry Simon, Ilya Spitkovsky
Given two orthogonal projections P and Q, we are interested in all unitary operators U such that UP=QU and UQ=PU. Such unitaries U have previously been constructed by Wang, Du, and…
Borodin-Okounkov and Szegö for Toeplitz operators on model spaces
Albrecht Böttcher
We consider the determinants of compressions of Toeplitz operators to finite-dimensional model spaces and establish analogues of the Borodin-Okounkov formula and the strong Szegö l…
Generalized Krein algebras and asymptotics of Toeplitz determinants
Albrecht Böttcher, Alexei Karlovich, Bernd Silbermann
We give a survey on generalized Krein algebras and their applications to Toeplitz determinants. Our methods originated in a paper by Mark Krein of 1966, where he sh…