Results 41 to 50 of about 6,845,583 (296)

Convolution semigroups of states. [PDF]

open access: yes, 2011
Convolution semigroups of states on a quantum group form the natural noncommutative analogue of convolution semigroups of probability measures on a locally compact group.
Lindsay, Martin, Skalski, Adam G.
core   +4 more sources

Infinite dimensional generalizations of Choi’s Theorem

open access: yesSpecial Matrices, 2019
In this paper we give a simple sequence of necessary and sufficient finite dimensional conditions for a positive map between certain subspaces of bounded linear operators on separable Hilbert spaces to be completely positive. These criterions are natural
Friedland Shmuel
doaj   +1 more source

Two Roads to Classicality [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2018
Mixing and decoherence are both manifestations of classicality within quantum theory, each of which admit a very general category-theoretic construction. We show under which conditions these two 'roads to classicality' coincide.
Bob Coecke, John Selby, Sean Tull
doaj   +1 more source

Completely positive maps on 𝑈*-algebras

open access: yes, 1972
Completely positive maps on U ∗ {U^ \ast } -algebras with identity are characterized in terms of ∗ ^ \ast -representations on Hilbert space.
W. L. Paschke
core   +1 more source

Categories of relations as models of quantum theory [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2015
Categories of relations over a regular category form a family of models of quantum theory. Using regular logic, many properties of relations over sets lift to these models, including the correspondence between Frobenius structures and internal groupoids.
Chris Heunen, Sean Tull
doaj   +1 more source

Interpolation by completely positive maps [PDF]

open access: yesLinear and Multilinear Algebra, 2011
Given commuting families of Hermitian matrices {A 1, … , A k } and {B 1, … , B k }, conditions for the existence of a completely positive map Φ, such that Φ(A j ) = B j for j = 1, … , k, are studied. Additional properties such as unital or/and trace preserving on the map Φ are also considered.
Chi-Kwong Li, Yiu-Tung Poon
openaire   +1 more source

Characterization of the order relation on the set of completely n-positive linear maps between C*-algebras [PDF]

open access: yesSurveys in Mathematics and its Applications, 2007
In this paper we characterize the order relation on the set of all nondegenerate completely n-positive linear maps between C*-algebras in terms of a self-dual Hilbert module induced by each completely n-positive linear map.
Maria Joita   +2 more
doaj  

Semantics for a Quantum Programming Language by Operator Algebras [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2014
This paper presents a novel semantics for a quantum programming language by operator algebras, which are known to give a formulation for quantum theory that is alternative to the one by Hilbert spaces.
Kenta Cho
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan   +18 more
wiley   +1 more source

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