Results 71 to 80 of about 470,444 (191)
Quantum Theory is a Quasi-stochastic Process Theory [PDF]
Electronic Proceedings in Theoretical Computer Science, 2018 There is a long history of representing a quantum state using a quasi-probability distribution: a distribution allowing negative values. In this paper we extend such representations to deal with quantum channels. The result is a convex, strongly monoidal,
John van de Wetering
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Local Operations and Completely Positive Maps in Algebraic Quantum Field Theory [PDF]
, 2015 Einstein introduced the locality principle which states that all physical effect in some finite space-time region does not influence its space-like separated finite region.
Y. Kitajima
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An Asymptotic Property of Factorizable Completely Positive Maps and the Connes Embedding Problem [PDF]
, 2014 We establish a reformulation of the Connes embedding problem in terms of an asymptotic property of factorizable completely positive maps. We also prove that the Holevo–Werner channels $${W_n^-}$$Wn- are factorizable, for all odd integers $${n\neq 3}$$n≠3.
U. Haagerup, Magdalena Musat
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Covariant Completely Positive Maps and Liftings
Rocky Mountain Journal of Mathematics, 1993 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Completely Positive Maps of the Cuntz Algebras
Journal of Functional Analysis, 1997 The author constructs a covariant functor from the category whose objects are separable Hilbert spaces and whose morphisms are contractions, into the category whose objects are unital \(C^*\)-algebras and whose morphisms are completely positive, identity preserving maps.
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Nuclearity and ${\mathrm {CPC}^*}$ -Systems
Forum of Mathematics, SigmaWe write arbitrary separable nuclear $\mathrm {C}^*$ -algebras as limits of inductive systems of finite-dimensional $\mathrm {C}^*$ -algebras with completely positive connecting maps. The characteristic feature of such ${\mathrm {CPC}^*}$
Kristin Courtney, Wilhelm Winter
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Completely positive maps with memory
, 2003 The prevailing description for dissipative quantum dynamics is given by the Lindblad form of a Markovian master equation, used under the assumption that memory effects are negligible. However, in certain physical situations, the master equation is essentially of a non-Markovian nature.
Daffer, Sonja +3 more
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Fixed Points Associated to Power of Normal Completely Positive Maps
, 2016 Let be a normal completely positive map with Kraus operators . An operator X is said to be a fixed point of , if . Let be the fixed points set of . In this paper, fixed points of are considered for , where means j-power of .
Haiyan Zhang, Hongying Si
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Two-qubit causal structures and the geometry of positive qubit-maps
New Journal of Physics, 2018 We study quantum causal inference in a setup proposed by Ried et al (2015 Nat. Phys. 11 414) in which a common cause scenario can be mixed with a cause–effect scenario, and for which it was found that quantum mechanics can bring an advantage in ...
Jonas M Kübler, Daniel Braun
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Special classes of positive and completely positive maps
Linear Algebra and its Applications, 1997 Many authors have studied the problem of characterising the positive and completely positive maps on square complex matrices of size \(n\) under certain invariant conditions. These authors have characterized the above mentioned maps that leave invariant the diagonal or the \(k\)th elementary symmetric functions of the diagonal entries, for \(1 < k \leq
Li, Chi-Kwong, Woerdeman, Hugo J.
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