Factorization properties for unbounded local positive maps

preprint2022arXivOpen access

Abstract

In this paper we present some factorization properties for unbounded local positive maps. We show that an unbounded local positive map ϕϕ on the minimal tensor product of the locally C∗C^{\ast }-algebras A\mathcal{A} and C∗(DE),C^{\ast }(\mathcal{D}_{\mathcal{E}}), where DE\mathcal{D}_{\mathcal{E}} is a Fréchet quantized domain, that is dominated by φ⊗φ\otimes id is of the forma ψ⊗ψ\otimes id, where ψψ is an unbounded local positive map dominated by φφ. As an application of this result, we show that given a local positive map φ:φ: A→\mathcal{A}\rightarrow B,\mathcal{B}, the local positive map φ⊗φ\otimes idMn(C)_{M_{n}\left( \mathbb{C}\right) } is local decomposable for some n≥2n\geq 2 if and only if φφ is a local CPCP-map. Also, we show that an unbounded local CCPCCP-map ϕϕ on the minimal tensor product of the unital locally C∗C^{\ast }-algebras A\mathcal{A} and B,\mathcal{B}, that is dominated by φ⊗ψφ\otimes ψ is of the forma φ⊗ψ~φ\otimes \widetilde{ψ}, where ψ~\widetilde{ψ} is an unbounded local CCPCCP- map dominated by ψψ, whenever φφ is pure.

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