2 papers
math.SP2026
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 disc…
math.FA2026
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…