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Mostrando ítems 31-39 de 39
Artículo
Device-independent certification of two bits of randomness from one entangled bit and Gisin's elegant Bell inequality
(American Physical Society, 2018-01-16)
We prove that as conjectured by Acín et al. [Phys. Rev. A 93, 040102(R) (2016)], two bits of randomness can be certified in a device-independent way from one bit of entanglement using the maximal quantum violation of Gisin’s ...
Artículo
Two fundamental experimental tests of nonclassicality with qutrits
(Nature Publishing Group, 2013)
We report two fundamental experiments on three-level quantum systems (qutrits). The first one tests the simplest task for which quantum mechanics provides an advantage with respect to classical physics. The quantum ...
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Experimental observation of quantum contextuality beyond Bell nonlocality
(American Physical Society, 2019-10-22)
Bell nonlocality and quantum contextuality are two important resources which, however, behave very differently in many tasks where the quantum correlation has an edge over its classical counterpart. In this work, we directly ...
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Automated quantum operations in photonic qutrits
(American Physical Society, 2018-02-02)
We report an experimental implementation of automated state transformations on spatial photonic qutrits following the theoretical proposal made by Baldijão et al. [Phys. Rev. A 96, 032329 (2017)]. A qutrit state is simulated ...
Artículo
Optimal preparation of graph states
(American Physical Society, 2011)
We show how to prepare any graph state of up to 12 qubits with (a) the minimum number of controlled-Z gates and (b) the minimum preparation depth. We assume only one-qubit and controlled-Z gates. The method exploits the ...
Artículo
Robust self-testing of quantum systems via noncontextuality Inequalities
(American Physical Society, 2019-06-26)
Characterizing unknown quantum states and measurements is a fundamental problem in quantum information processing. In this Letter, we provide a novel scheme to self-test local quantum systems using noncontextuality ...
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Artículo
Minimal true-implies-false and true-implies-true sets of propositions in noncontextual hidden-variable theories
(American Physical Society, 2018)
An essential ingredient in many examples of the conflict between quantum theory and noncontextual hidden variables (e.g., the proof of the Kochen-Specker theorem and Hardy’s proof of Bell’s theorem) is a set of ...
Artículo
Thermodynamical cost of some interpretations of quantum theory
(PRA, 2016)
The interpretation of quantum theory is one of the longest-standing debates in physics. Type I interpretations see quantum probabilities as determined by intrinsic properties of the observed system. Type II see them as ...