Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Kurzyński, Paweł"'
We show that a maximal violation of the Bell-CHSH inequality for two entangled qubits, i.e., Bell non-locality, is a direct consequence of a local bit erasure by means of a quasi-stochastic process, i.e., a stochastic process in which some transition
Externí odkaz:
http://arxiv.org/abs/2405.16540
The relations between Bell nonlocality and Kochen-Specker contextuality have been subject of research from many different perspectives in the last decades. Recently, some interesting results on these relations have been explored in the so-called gene
Externí odkaz:
http://arxiv.org/abs/2405.02964
We demonstrate how to universally simulate ensemble statistics of projective local measurements on any $n$-qubit state shared among $n$ observers with classical communication and shared randomness. Our technique originates from protocols designed to
Externí odkaz:
http://arxiv.org/abs/2402.11610
We demonstrate a basic non-classical effect in a quasi-probabilistic toy model with local Alice and Bob who share classical randomness. Our scenario differs from the orthodox demonstrations of non-classicality such as violations of Bell inequalities
Externí odkaz:
http://arxiv.org/abs/2402.11607
Publikováno v:
Phys. Rev. A 110, 012407 (2024)
The investigation of many-body interactions holds significant importance in both quantum foundations and information. Hamiltonians coupling multiple particles at once, beyond others, can lead to a faster entanglement generation, multiqubit gate imple
Externí odkaz:
http://arxiv.org/abs/2401.01824
We demonstrate that the unitary dynamics of a multi-qubit system can display hypersensitivity to initial state perturbation. This contradicts the common belief that the classical approach based on the exponential divergence of initially neighboring t
Externí odkaz:
http://arxiv.org/abs/2307.14678
Publikováno v:
New J. Phys. 25, 093040 (2023)
Natural interactions among multiple quantum objects are fundamentally composed of two-body terms only. In contradistinction, single global unitaries that generate highly entangled states typically arise from Hamiltonians that couple multiple individu
Externí odkaz:
http://arxiv.org/abs/2303.09238
We show an operational approach to bilocality with quasi-probability distributions and quasi-stochastic processes. This approach clearly demonstrates that negative probabilities are necessary to violate bilocality. It also highlights a subtle interpl
Externí odkaz:
http://arxiv.org/abs/2302.03263
Publikováno v:
Phys. Rev. A 107, 022223 (2023)
The Kochen-Specker theorem states that exclusive and complete deterministic outcome assignments are impossible for certain sets of measurements, called Kochen-Specker (KS) sets. A straightforward consequence is that KS sets do not have joint probabil
Externí odkaz:
http://arxiv.org/abs/2210.06822
Publikováno v:
Phys. Rev. A 107, 032201 (2023)
Discrete-time quantum walks (DTQWs) provide a convenient platform for a realisation of many topological phases in noninteracting systems. They often offer more possibilities than systems with a static Hamiltonian. Nevertheless, researchers are still
Externí odkaz:
http://arxiv.org/abs/2209.12820