109 citations · 546 across the 60 of their papers we have counts for
5 papers · 1 filter
Classical KMS Functionals and Phase Transitions in Poisson Geometry
Nicolò Drago, Stefan Waldmann
We study the convex cone of not necessarily smooth measures satisfying the classical KMS condition within the context of Poisson geometry. We discuss the general properties of KMS…
Deformation Quantization of a Certain Type of Open Systems
Florian Becher, Nikolai Neumaier, Stefan Waldmann
We give an approach to open quantum systems based on formal deformation quantization. It is shown that classical open systems of a certain type can be systematically quantized into…
Positivity in Rieffel's strict deformation quantization
Stefan Waldmann
We review a recent result on Rieffel's deformation quantization by actions of R^d: it is shown that for every state omega_0 of the undeformed C*-algebra A_0 there is a continuous s…
Complete Positivity of Rieffel's Deformation Quantization by Actions of
Daniel Kaschek, Nikolai Neumaier, Stefan Waldmann
In this paper we consider C*-algebraic deformations a la Rieffel and show that every state of the undeformed algebra can be deformed into a state of the deformed algebra in the sen…
The Covariant Picard Groupoid in Differential Geometry
Stefan Waldmann
In this article we discuss some general results on the covariant Picard groupoid in the context of differential geometry and interpret the problem of lifting Lie algebra actions to…