Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Stefano Pironio"'
Publikováno v:
Quantum, Vol 8, p 1332 (2024)
Losses in the transmission channel, which increase with distance, pose a major obstacle to photonics demonstrations of quantum nonlocality and its applications. Recently, Chaturvedi, Viola, and Pawlowski (CVP) [arXiv:2211.14231] introduced a variatio
Externí odkaz:
https://doaj.org/article/4d81e3cfbb5e43d885a27646ef3f7a68
Publikováno v:
Quantum, Vol 6, p 843 (2022)
According to the entropy accumulation theorem, proving the unconditional security of a device-independent quantum key distribution protocol reduces to deriving tradeoff functions, i.e., bounds on the single-round von Neumann entropy of the raw key as
Externí odkaz:
https://doaj.org/article/c4abbdd1074145859dd51d61e0208a9a
Publikováno v:
New Journal of Physics, Vol 24, Iss 6, p 063015 (2022)
Entanglement and quantum communication are paradigmatic resources in quantum information science leading to correlations between systems that have no classical analogue. Correlations due to entanglement when communication is absent have for long been
Externí odkaz:
https://doaj.org/article/a5bf42a794604adabedca10fa140f2f7
Publikováno v:
Quantum, Vol 6, p 620 (2022)
We introduce new methods and tools to study and characterise classical and quantum correlations emerging from prepare-and-measure experiments with informationally restricted communication. We consider the most general kind of informationally restrict
Externí odkaz:
https://doaj.org/article/eda46ce909204a0e983bc955c4a446b1
Publikováno v:
PRX Quantum, Vol 2, Iss 4, p 040357 (2021)
We investigate the correlations that can arise between Alice and Bob in prepare-and-measure communication scenarios where the source (Alice) and the measurement device (Bob) can share prior entanglement. The paradigmatic example of such a scenario is
Externí odkaz:
https://doaj.org/article/4e6d18c6e2df44c19a5a067aa5a6adfa
Publikováno v:
Quantum, Vol 5, p 443 (2021)
The simplest device-independent quantum key distribution protocol is based on the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality and allows two users, Alice and Bob, to generate a secret key if they observe sufficiently strong correlations. There
Externí odkaz:
https://doaj.org/article/7b78960b483d42c79461758dec1dfd8c
Autor:
Ravishankar Ramanathan, Monika Rosicka, Karol Horodecki, Stefano Pironio, Michał Horodecki, Paweł Horodecki
Publikováno v:
Quantum, Vol 4, p 308 (2020)
The Kochen-Specker theorem is a fundamental result in quantum foundations that has spawned massive interest since its inception. We show that within every Kochen-Specker graph, there exist interesting subgraphs which we term $01$-gadgets, that captur
Externí odkaz:
https://doaj.org/article/1b7dc632292347b2b43daffcf75eb999
Autor:
Thomas Van Himbeeck, Jonatan Bohr Brask, Stefano Pironio, Ravishankar Ramanathan, Ana Belén Sainz, Elie Wolfe
Publikováno v:
Quantum, Vol 3, p 186 (2019)
The causal structure of any experiment implies restrictions on the observable correlations between measurement outcomes, which are different for experiments exploiting classical, quantum, or post-quantum resources. In the study of Bell nonlocality, t
Externí odkaz:
https://doaj.org/article/72dd8f4925c14960a2c059af363d0e5d
Publikováno v:
Quantum, Vol 2, p 86 (2018)
In quantum cryptography, device-independent (DI) protocols can be certified secure without requiring assumptions about the inner workings of the devices used to perform the protocol. In order to display nonlocality, which is an essential feature in D
Externí odkaz:
https://doaj.org/article/03c9cdc4a5524fb08d6fda40afbb8eb7
Publikováno v:
New Journal of Physics, Vol 20, Iss 2, p 023049 (2018)
Device-independent randomness generation and quantum key distribution protocols rely on a fundamental relation between the non-locality of quantum theory and its random character. This relation is usually expressed in terms of a trade-off between the
Externí odkaz:
https://doaj.org/article/7e65c2136e4b4359bc8da8f2dbfdad3a