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  1. AU="Milani, Giorgio"
  2. AU="Preeti Thakur"
  3. AU="Wegmair, Lisa"
  4. AU="Sangpukdee, Aree"
  5. AU="Huang, Sequin"
  6. AU="Robin Kageyama"
  7. AU="Thapa Shrestha, Upendra"
  8. AU="Litvinovskaya, Raisa P"
  9. AU="MacDougall‐Shackleton, Elizabeth A."
  10. AU="Rajendram, Rathie"
  11. AU=Laxminarayan Ramanan
  12. AU="Perriman, Diana M"
  13. AU=Radich Jerald P
  14. AU="Velthuis, Birgitta"
  15. AU="Gibbs, Tom"
  16. AU=Mezzabotta Federica
  17. AU="Jalas, Sören"
  18. AU="Suma, Rache"
  19. AU="Calderón, Alejandro"
  20. AU="Demertzi, Vasiliki"
  21. AU="Leonidov, A"
  22. AU="Luo, Suxin"
  23. AU="Thompson, Charlotte A S"
  24. AU="Dubbel, Polly"
  25. AU="Ten Bosch, Nora"
  26. AU="Giménez-Arnau, Ana Maria"
  27. AU=Maul Robert W.
  28. AU="Ivn Prez-MaldonadoauthorLaboratorio de Toxicologa Molecular, Centro de Investigacin Aplicada en Ambiente y Salud (CIAAS), Coordinacin para la Innovacin y Aplicacin de la Ciencia y la Tecnologa (CIACYT), Universidad Autnoma de San Luis Potos, MexicoFacultad de Medicina, Universidad Autnoma de San Luis Potos, San Luis Potos, MexicoFacultad de Enfermera, Universidad Autnoma de Zacatecas, Mexico"
  29. AU="Hansen, Kristian Schultz"
  30. AU="Davenport, Bennett"

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  1. Artikel ; Online: Multi-client distributed blind quantum computation with the Qline architecture.

    Polacchi, Beatrice / Leichtle, Dominik / Limongi, Leonardo / Carvacho, Gonzalo / Milani, Giorgio / Spagnolo, Nicolò / Kaplan, Marc / Sciarrino, Fabio / Kashefi, Elham

    Nature communications

    2023  Band 14, Heft 1, Seite(n) 7743

    Abstract: Universal blind quantum computing allows users with minimal quantum resources to delegate a quantum computation to a remote quantum server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such ...

    Abstract Universal blind quantum computing allows users with minimal quantum resources to delegate a quantum computation to a remote quantum server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such a protocol have only involved one client. However, an increasing number of multi-party algorithms, e.g. federated machine learning, require the collaboration of multiple clients to carry out a given joint computation. In this work, we propose and experimentally demonstrate a lightweight multi-client blind quantum computation protocol based on a recently proposed linear quantum network configuration (Qline). Our protocol originality resides in three main strengths: scalability, since we eliminate the need for each client to have its own trusted source or measurement device, low-loss, by optimizing the orchestration of classical communication between each client and server through fast classical electronic control, and compatibility with distributed architectures while remaining intact even against correlated attacks of server nodes and malicious clients.
    Sprache Englisch
    Erscheinungsdatum 2023-11-25
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-43617-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Experimental nonclassicality in a causal network without assuming freedom of choice.

    Polino, Emanuele / Poderini, Davide / Rodari, Giovanni / Agresti, Iris / Suprano, Alessia / Carvacho, Gonzalo / Wolfe, Elie / Canabarro, Askery / Moreno, George / Milani, Giorgio / Spekkens, Robert W / Chaves, Rafael / Sciarrino, Fabio

    Nature communications

    2023  Band 14, Heft 1, Seite(n) 909

    Abstract: In a Bell experiment, it is natural to seek a causal account of correlations wherein only a common cause acts on the outcomes. For this causal structure, Bell inequality violations can be explained only if causal dependencies are modeled as intrinsically ...

    Abstract In a Bell experiment, it is natural to seek a causal account of correlations wherein only a common cause acts on the outcomes. For this causal structure, Bell inequality violations can be explained only if causal dependencies are modeled as intrinsically quantum. There also exists a vast landscape of causal structures beyond Bell that can witness nonclassicality, in some cases without even requiring free external inputs. Here, we undertake a photonic experiment realizing one such example: the triangle causal network, consisting of three measurement stations pairwise connected by common causes and no external inputs. To demonstrate the nonclassicality of the data, we adapt and improve three known techniques: (i) a machine-learning-based heuristic test, (ii) a data-seeded inflation technique generating polynomial Bell-type inequalities and (iii) entropic inequalities. The demonstrated experimental and data analysis tools are broadly applicable paving the way for future networks of growing complexity.
    Sprache Englisch
    Erscheinungsdatum 2023-02-17
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-36428-w
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Experimental test of quantum causal influences.

    Agresti, Iris / Poderini, Davide / Polacchi, Beatrice / Miklin, Nikolai / Gachechiladze, Mariami / Suprano, Alessia / Polino, Emanuele / Milani, Giorgio / Carvacho, Gonzalo / Chaves, Rafael / Sciarrino, Fabio

    Science advances

    2022  Band 8, Heft 8, Seite(n) eabm1515

    Abstract: Since Bell's theorem, it is known that local realism fails to explain quantum phenomena. Bell inequality violations manifestly show the incompatibility of quantum theory with classical notions of cause and effect. As recently found, however, the ... ...

    Abstract Since Bell's theorem, it is known that local realism fails to explain quantum phenomena. Bell inequality violations manifestly show the incompatibility of quantum theory with classical notions of cause and effect. As recently found, however, the instrumental scenario-a pivotal tool in causal inference-allows for nonclassicality signatures going beyond this paradigm. If we are not limited to observational data and can intervene in our setup, then we can witness quantum violations of classical bounds on the causal influence among the involved variables even when no Bell-like violation is possible. That is, through interventions, the quantum behavior of a system that would seem classical can be demonstrated. Using a photonic setup-faithfully implementing the instrumental causal structure and switching between observation and intervention run by run-we experimentally witness such a nonclassicality. We also test quantum bounds for the causal influence, showing that they provide a reliable tool for quantum causal modeling.
    Sprache Englisch
    Erscheinungsdatum 2022-02-25
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abm1515
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Experimental violation of n-locality in a star quantum network.

    Poderini, Davide / Agresti, Iris / Marchese, Guglielmo / Polino, Emanuele / Giordani, Taira / Suprano, Alessia / Valeri, Mauro / Milani, Giorgio / Spagnolo, Nicolò / Carvacho, Gonzalo / Chaves, Rafael / Sciarrino, Fabio

    Nature communications

    2020  Band 11, Heft 1, Seite(n) 2467

    Abstract: The launch of a satellite capable of distributing entanglement through long distances and the first loophole-free violation of Bell inequalities are milestones indicating a clear path for the establishment of quantum networks. However, nonlocality in ... ...

    Abstract The launch of a satellite capable of distributing entanglement through long distances and the first loophole-free violation of Bell inequalities are milestones indicating a clear path for the establishment of quantum networks. However, nonlocality in networks with independent entanglement sources has only been experimentally verified in simple tripartite networks, via the violation of bilocality inequalities. Here, by using a scalable photonic platform, we implement star-shaped quantum networks consisting of up to five distant nodes and four independent entanglement sources. We exploit this platform to violate the chained n-locality inequality and thus witness, in a device-independent way, the emergence of nonlocal correlations among the nodes of the implemented networks. These results open new perspectives for quantum information processing applications in the relevant regime where the observed correlations are compatible with standard local hidden variable models but are non-classical if the independence of the sources is taken into account.
    Sprache Englisch
    Erscheinungsdatum 2020-05-18
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-020-16189-6
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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