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of 30
pro vyhledávání: '"Faleiro, Ricardo"'
Few primitives are as intertwined with the foundations of cryptography as Oblivious Transfer (OT). Not surprisingly, with the advent of the use of quantum resources in information processing, OT played a central role in establishing new possibilities
Externí odkaz:
http://arxiv.org/abs/2410.08367
Autor:
Mendes, Pedro Neto, Teixeira, Gonçalo Lobato, Pinho, David, Rocha, Rui, André, Paulo, Niehus, Manfred, Faleiro, Ricardo, Rusca, Davide, Cruzeiro, Emmanuel Zambrini
Quantum key distribution is costly and, at the moment, offers low performance in space applications. Other more recent protocols could offer a potential practical solution to this problem. In this work, a preliminary optical payload design using comm
Externí odkaz:
http://arxiv.org/abs/2310.16017
Publikováno v:
Quantum 8, 1230 (2024)
This work presents a study of Kolmogorov complexity for general quantum states from the perspective of deterministic-control quantum Turing Machines (dcq-TM). We extend the dcq-TM model to incorporate mixed state inputs and outputs, and define dcq-co
Externí odkaz:
http://arxiv.org/abs/2305.14252
Publikováno v:
Phys. Rev. A 109, 012427 (2024)
In this work we focus on two classes of games: XOR nonlocal games and XOR* sequential games with monopartite resources. XOR games have been widely studied in the literature of nonlocal games, and we introduce XOR* games as their natural counterpart w
Externí odkaz:
http://arxiv.org/abs/2210.00397
Publikováno v:
Quantum 7, 1090 (2023)
Semi-device-independent quantum key distribution aims to achieve a balance between the highest level of security, device independence, and experimental feasibility. Semi-quantum key distribution presents an intriguing approach that seeks to minimize
Externí odkaz:
http://arxiv.org/abs/2103.06829
Autor:
Faleiro, Ricardo, Goulão, Manuel
Publikováno v:
Phys. Rev. A 103, 022430, 2021
In the spirit of device-independent cryptography, we present a two-party quantum authorization primitive with non-locality as its fueling resource. Therein, users are attributed authorization levels granting them access to a private database accordin
Externí odkaz:
http://arxiv.org/abs/2103.01662
Publikováno v:
Quantum 7, 986 (2023)
This work overviews the single-particle two-way communication protocol recently introduced by del Santo and Daki\'c (dSD), and analyses it using the process matrix formalism. We give a detailed account of the importance and the operational meaning of
Externí odkaz:
http://arxiv.org/abs/2010.16042
Autor:
Faleiro, Ricardo
Publikováno v:
Quantum Inf Process 19, 229 (2020)
The non-local game scenario provides a powerful framework to study the limitations of classical and quantum correlations, by studying the upper bounds of the winning probabilities those correlations offer in cooperation games where communication betw
Externí odkaz:
http://arxiv.org/abs/1910.04478
Akademický článek
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The aim of this article is to study the effect of an Event Horizon on the entanglement of the Quantum Vacuum and how entanglement, together with the Holographic Principle, may explain the current value of the Cosmological Constant, in light of recent
Externí odkaz:
http://arxiv.org/abs/1607.02115