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Mostrando ítems 1-10 de 17
Artículo
Self-testing of a single quantum system from theory to experiment
(Nature Research, 2023-10-19)
Self-testing allows one to characterise quantum systems under minimal assumptions. However, existing schemes rely on quantum nonlocality and cannot be applied to systems that are not entangled. Here, we introduce a robust ...
Artículo
Bell nonlocality with intensity information only
(American Physical Society, 2020-09-01)
We address the problem of detecting bipartite Bell nonlocality whenever the only experimental information are the intensities produced in each run of the experiment by an unknown number of particles. We point out that this ...
Artículo
Quantum key distribution in the Holevo limit
(American Physical Society, 2000-12-25)
A theorem by Shannon and the Holevo theorem impose that the efficiency of any protocol for quantum key distribution, E , defined as the number of secret (i.e., allowing eavesdropping detection) bits per transmitted bit ...
Artículo
Revisiting five decades of 234Th data: a comprehensive global oceanic compilation
(Copernicus Publications, 2022)
We present here a global oceanic compilation of 234Th measurements that collects results from researchers and laboratories over a period exceeding 50 years. The origin of the 234Th sampling in the ocean goes back to 1967, ...
Artículo
Irreducible magic sets for n-Qubit systems
(Physical Review Letters, 2022-11-07)
Magic sets of observables are minimal structures that capture quantum state-independent advantage for systems of n ≥ 2 qubits and are, therefore, fundamental tools for investigating the interface between classical and ...
Artículo
Converting contextuality into nonlocality
(American Physical Society, 2021-08)
We introduce a general method which converts, in a unified way, any form of quantum contextuality, including any form of state-dependent contextuality, into a quantum violation of a bipartite Bell inequality. As an example, ...
Artículo
234Th-derived particle fluxes and seasonal variability: when is the ss assumption reliable? Insights from a novel Approach for carbon flux simulation
(AGU Publications, 2018-12)
Th measurements are widely used to estimate the downward carbon flux of particles via the oceanic Biological Pump. Carbon export is evaluated from 234Th-238U disequilibrium assuming either steady state (SS) conditions, or ...
Artículo
Determination of uranium and polonium in Sparus aurata by alpha spectrometry
(Sociedad Mexicana de Física, 2012-06)
The aim of this study was optimizing conditions for the specific activities determination of some uranium-series radionuclides present in Sparus aurata by alpha spectrometry. Determinations of specific activities were ...
Artículo
Bell non-locality and Kochen-Specker contextuality: how are they connected?
(Springer, 2021-05-22)
Bell non-locality and Kochen–Specker (KS) contextuality are logically independent concepts, fuel different protocols with quantum vs classical advantage, and have distinct classical simulation costs. A natural question is ...
Artículo
Experimental test of high-dimensional quantum contextuality based on contextuality concentration
(American Physical Society, 2023-06-13)
Contextuality is a distinctive feature of quantum theory and a fundamental resource for quantum computation. However, existing examples of contextuality in high-dimensional systems lack the necessary robustness required ...