109 citations · 546 across the 60 of their papers we have counts for
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math.QA2004★ 8 cited
Hermitian star products are completely positive deformations
Henrique Bursztyn, Stefan Waldmann
Let M be a Poisson manifold equipped with a Hermitian star product. We show that any positive linear functional on C^\infty(M) can be deformed into a positive linear functional wit…
math.QA2004
The H-Covariant Strong Picard Groupoid
Stefan Jansen, Stefan Waldmann
The notion of H-covariant strong Morita equivalence is introduced for *-algebras over C = R(i) with an ordered ring R which are equipped with a *-action of a Hopf *-algebra H. This…
math.QA2004★ 30 cited
States and representations in deformation quantization
Stefan Waldmann
In this review we discuss various aspects of representation theory in deformation quantization starting with a detailed introduction to the concepts of states as positive functiona…