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Search results for: entangled histories

  • Entangled Histories vs. the Two-State-Vector Formalism - Towards a Better Understanding of Quantum Temporal Correlations

    Publication

    The Two-State-Vector formalism and the Entangled Histories formalism are attempts to betterunderstand quantum correlations in time. Both formalisms share some similarities, but they are notidentical, having subtle differences in their interpretation and manipulation of quantum temporalstructures. However, the main objective of this paper is to prove that, with appropriately definedscalar products, both formalisms can be...

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  • Krótka historia Sympozjum Historii Elektryki

    Przedstawiono historię dotychczasowych edycji Sympozjum Historia Elektryki. Pierwsze Sympozjum zostało zorganizowane w Gdańsku z inicjatywy Centralnej Komisji Historycznej Stowarzyszenia Elektryków Polskich. Było okazją do spotkania osób interesujących się historią z wyższych uczelni technicznych i przemysłu, ale również zajmujących się historią zawodowo. Sukces pierwszego spotkania spowodował, że stała się to cykliczna impreza,...

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  • Entangled Religions

    Journals

    eISSN: 2363-6696

  • Historia Historias

    Journals

    ISSN: 2318-1729

  • Completely entangled subspaces of entanglement depth k

    Publication

    - PHYSICAL REVIEW A - Year 2024

    We introduce a class of entangled subspaces: completely entangled subspaces of entanglement depth k (k-CESs). These are subspaces of multipartite Hilbert spaces containing only pure states with an entanglement depth of at least k. We present an efficient construction of k-CESs of any achievable dimensionality in any multipartite scenario. Further, we discuss the relation between these subspaces and unextendible product bases (UPBs)....

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  • On quantum cryptography with bipartite bound entangled states

    Publication

    Ostatnio pokazano bezpośrednie zastosowanie splątania związanego w kryptografii kwantowej. W niniejszym artykule dokonano przeglądu niektórych najnowszych osiągnięć dotyczących tego zagadnienia. W szczególności przypomniano istotne pojęcia i definicje. Ponadto podano nową konstrukcję stanów o splątaniu związanym, posiadających bezpieczne korelacje, dostarczając w ten sposób niskowymiarowe (6x6) stany o splątaniu związanym z niezerowym...

  • Universal construction of genuinely entangled subspaces of any size

    Publication

    We put forward a simple construction of genuinely entangled subspaces – subspaces supporting only genuinely multipartite entangled states – of any permissible dimensionality for any number of parties and local dimensions. The method uses nonorthogonal product bases, which are built from totally nonsingular matrices with a certain structure. We give an explicit basis for the constructed subspaces. An immediate consequence of our...

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  • Simple sufficient condition for subspace to be completely or genuinely entangled

    Publication

    - NEW JOURNAL OF PHYSICS - Year 2021

    We introduce a simple sufficient criterion, which allows one to tell whether a subspace of a bipartite or multipartite Hilbert space is entangled. The main ingredient of our criterion is a bound on the minimal entanglement of a subspace in terms of entanglement of vectors spanning that subspace expressed for geometrical measures of entanglement. The criterion is applicable to both completely and genuinely entangled subspaces. We...

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  • An approach to constructing genuinely entangled subspaces of maximal dimension

    Publication

    Genuinely entangled subspaces (GESs) are the class of completely entangled subspaces that contain only genuinely multiparty entangled states. They constitute a particularly useful notion in the theory of entanglement but also have found an application, for instance, in quantum error correction and cryptography. In a recent study (Demianowicz and Augusiak in Phys Rev A 98:012313, 2018), we have shown how GESs can be efficiently...

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  • From unextendible product bases to genuinely entangled subspaces

    Publication

    - PHYSICAL REVIEW A - Year 2018

    Unextendible product bases (UPBs) are interesting mathematical objects arising in composite Hilbert spaces that have found various applications in quantum information theory, for instance in a construction of bound entangled states or Bell inequalities without quantum violation. They are closely related to another important notion, completely entangled subspaces (CESs), which are those that do not contain any fully separable pure...

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