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Entanglement beyond subsystems

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arxiv quant-ph/0403044 v1 pith:QPDAZEAY submitted 2004-03-04 quant-ph cond-mat.str-el

Lorenza Viola , Howard Barnum , Emanuel Knill , Gerardo Ortiz , Rolando Somma This is my paper
classification quant-phcond-mat.str-el
keywords entanglementbeyonddirectlynotionquantumsubsystemsaccomplishedallows
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We present a notion of generalized entanglement which goes beyond the conventional definition based on quantum subsystems. This is accomplished by directly defining entanglement as a property of quantum states relative to a distinguished set of observables singled out by Physics. While recovering standard entanglement as a special case, our notion allows for substantially broader generality and flexibility, being applicable, in particular, to situations where existing tools are not directly useful.

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  1. Partitions in quantum theory

    quant-ph 2025-06 conditional novelty 7.0 of 10

    A definition of multipartitions of quantum systems into possibly non-factor sub-C* algebras, with a representation theorem showing that some partitions, such as fermionic modes, are not fully representable on tensor-p...

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