29 citations · 35 across the 5 of their papers we have counts for
5 papers
Jordan maps and triple maps on algebras of unbounded operators
Werner Timmermann
The paper contains results on the structure of Jordan maps and several kinds of triple maps on standard algebras of unbounded operators in Hilbert spaces. These results are unbound…
Zero product preservers and orthogonality preservers in algebras of unbounded operators
Werner Timmermann
Applying a result of abstract ring theory we get that bijective additive mappings on standard algebras of unbounded operators preserving zero products are multiples of ring isomorp…
Additive mappings in algebras of unbounded operators preserving operators of rank one
W. Timmermann
Let be a dense linear manifold in a Hilbert space and let be the *-algebra of all linear operators such that $A \mathcal D \subset…
Preserving the measure of compatibility between quantum states
Lajos Molnar, Werner Timmermann
In this paper after defining the abstract concept of compatibility-like functions on quantum states, we prove that every bijective transformation on the set of all states which pre…
Isometries of quantum states
Lajos Molnar, Werner Timmermann
This paper treats the isometries of metric spaces of quantum states. We consider two metrics on the set all quantum states, namely the Bures metric and the one which comes from the…