63 citations · 134 across the 12 of their papers we have counts for
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math-ph2008★ 10 cited
Covariant quantum instruments
Claudio Carmeli, Teiko Heinosaari, Alessandro Toigo
The structure of covariant instruments is studied and a general structure theorem is derived. A detailed characterization is given to covariant instruments in the case of an irredu…
math-ph2008★ 8 cited
Extremal covariant positive operator valued measures: the case of a compact symmetry group
Claudio Carmeli, Teiko Heinosaari, Juha-Pekka Pellonpää +1
Given a unitary representation U of a compact group G and a transitive G-space , we characterize the extremal elements of the convex set of all U-covariant positive operator val…