Quick Quantum Steering: Overcoming Loss and Noise with Qudits

Autor: Vatshal Srivastav, Natalia Herrera Valencia, Will McCutcheon, Saroch Leedumrongwatthanakun, Sébastien Designolle, Roope Uola, Nicolas Brunner, Mehul Malik

Publikováno v: Physical Review X, Vol 12, Iss 4, p 041023 (2022)

A primary requirement for a robust and unconditionally secure quantum network is the establishment of quantum nonlocal correlations over a realistic channel. While loophole-free tests of Bell nonlocality allow for entanglement certification in such a

Externí odkaz: https://doaj.org/article/ca2d76d2021f47a086a331790c95b906

Bounding and Simulating Contextual Correlations in Quantum Theory

Autor: Armin Tavakoli, Emmanuel Zambrini Cruzeiro, Roope Uola, Alastair A. Abbott

Publikováno v: PRX Quantum, Vol 2, Iss 2, p 020334 (2021)

We introduce a hierarchy of semidefinite relaxations of the set of quantum correlations in generalized contextuality scenarios. This constitutes a simple and versatile tool for bounding the magnitude of quantum contextuality. To illustrate its utilit

Externí odkaz: https://doaj.org/article/f148499e2c014a288f4c9c127e9e0040

Entropic Steering Criteria: Applications to Bipartite and Tripartite Systems

Autor: Ana C. S. Costa, Roope Uola, Otfried Gühne

Publikováno v: Entropy, Vol 20, Iss 10, p 763 (2018)

The effect of quantum steering describes a possible action at a distance via local measurements. Whereas many attempts on characterizing steerability have been pursued, answering the question as to whether a given state is steerable or not remains a

Externí odkaz: https://doaj.org/article/267d3f683dd8484fb0d67d409fb95212

Naimark dilations of qubit POVMs and joint measurements

Autor: Juha-Pekka Pellonpää, Sébastien Designolle, Roope Uola

Publikováno v: Journal of Physics A: Mathematical and Theoretical. 56:155303

Measurement incompatibility is one of the cornerstones of quantum theory. This phenomenon appears in many forms, of which the concept of non-joint measurability has received considerable attention in the recent years. In order to characterise this no

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eac9c1322aa2143178c0b8f40f975713
https://doi.org/10.1088/1751-8121/acc21c

Network Quantum Steering

Autor: Roope Uola, Ivan Šupić, Paul Skrzypczyk, Benjamin D. M. Jones, Nicolas Brunner

Publikováno v: Physical Review Letters
Physical Review Letters, American Physical Society, 2021, 127 (17), pp.170405. ⟨10.1103/PhysRevLett.127.170405⟩
Jones, B D M, Supic, I, Uola, R, Brunner, N & Skrzypczyk, P 2021, ' Network quantum steering ', Physical Review Letters, vol. 127, no. 17, 170405 . https://doi.org/10.1103/PhysRevLett.127.170405
Physical review letters, Vol. 127 (2021) P. 170405

The development of large-scale quantum networks promises to bring a multitude of technological applications as well as shed light on foundational topics, such as quantum nonlocality. It is particularly interesting to consider scenarios where sources

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55db09372bbee7c6f6fccc54047f1122
https://hal.archives-ouvertes.fr/hal-03433051