Results 41 to 50 of about 590,145 (336)
Quantum discord and entanglement in grover search algorithm
Open Physics, 2016 Imperfections and noise in realistic quantum computers may seriously affect the accuracy of quantum algorithms. In this article we explore the impact of static imperfections on quantum entanglement as well as non-entangled quantum correlations in Grover ...
Ye Bin +3 more
doaj +1 more source
Fully nonlocal quantum correlations [PDF]
Physical Review A, 2012 Quantum mechanics is a nonlocal theory, but not as nonlocal as the no-signalling principle allows. However, there exist quantum correlations that exhibit maximal nonlocality: they are as nonlocal as any non-signalling correlations and thus have a local content, quantified by the fraction $p_L$ of events admitting a local description, equal to zero ...
Andrea Chiuri +7 more
openaire +4 more sources
Tripartite entanglement and quantum correlation
Journal of High Energy Physics, 2021 We provide an analytical tripartite-study from the generalized R-matrix. It provides the upper bound of the maximum violation of Mermin’s inequality. For a generic 2-qubit pure state, the concurrence or R-matrix characterizes the maximum violation of ...
Xingyu Guo, Chen-Te Ma
doaj +1 more source
Verifying the Quantumness of Bipartite Correlations [PDF]
Physical Review Letters, 2016 Entanglement is at the heart of most quantum information tasks, and therefore considerable effort has been made to find methods of deciding the entanglement content of a given bipartite quantum state. Here, we prove a fundamental limitation to deciding if an unknown state is entangled or not: we show that any quantum measurement which can answer this ...
Carmeli, Claudio +4 more
openaire +6 more sources
Device-independent dimension test in a multiparty Bell experiment
New Journal of Physics, 2019 A device-independent dimension test for a Bell experiment aims to estimate the underlying Hilbert space dimension that is required to produce given measurement statistical data without any other assumptions concerning the quantum apparatus. Previous work
Zhaohui Wei, Jamie Sikora
doaj +1 more source
Thermodynamics and quantum correlations
, 2023 Thermodynamics traditionally deals with macroscopic systems at thermal equilibrium. However, since the very beginning of the theory, its range of applicability has only increased, nowadays being applied to virtually every field of science, and to systems of extremely different size. This thesis is devoted to the study of thermodynamics in the quantum
openaire +4 more sources
Quantum correlations for the metric [PDF]
Physical Review D, 2017 We discuss the correlation function for the metric for homogeneous and isotropic cosmologies. The exact propagator equation determines the correlation function as the inverse of the second functional derivative of the quantum effective action. This formulation relates the metric correlation function employed in quantum gravity computations to ...
openaire +3 more sources
Converting Coherence to Quantum Correlations [PDF]
Physical Review Letters, 2016 Recent results in quantum information theory characterize quantum coherence in the context of resource theories. Here we study the relation between quantum coherence and quantum discord, a kind of quantum correlation which appears even in non-entangled states.
Jiajun Ma +5 more
openaire +8 more sources
Macroscopically Nonlocal Quantum Correlations [PDF]
Physical Review Letters, 2021 It is usually believed that coarse-graining of quantum correlations leads to classical correlations in the macroscopic limit. Such a principle, known as macroscopic locality, has been proved for correlations arising from independent and identically distributed (IID) entangled pairs. In this letter we consider the generic (non-IID) scenario.
Miguel Gallego +2 more
openaire +4 more sources
Entropy, 2020 Quantum correlations of higher-dimensional systems are an important content of quantum information theory and quantum information application. The quantification of quantum correlation of high-dimensional quantum systems is crucial, but difficult.
Lianzhen Cao +5 more
doaj +1 more source