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arxiv: quant-ph/0307132 · v1 · submitted 2003-07-18 · 🪐 quant-ph

A Class of Linear Positive Maps in Matrix Algebras

classification 🪐 quant-ph
keywords mapsclasslinearpositiveaffinealgebrasballclosed
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A class of linear positive, trace preserving maps in $M_n$ is given in terms of affine maps in $\bBR^{n^2-1}$ which map the closed unit ball into itself.

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  1. Detecting bipartite entanglement with PnCP maps and non-negative polynomials

    quant-ph 2026-05 conditional novelty 5.0

    Implements PnCP maps from non-SOS polynomials, proves they are indecomposable and boundary-localized, shows inequivalence to most known maps, and demonstrates detection of PPT entangled states missed by other criteria.