Mandarino Antonio, Scala Giovanni
International Centre for Theory of Quantum Technologies, University of Gdańsk, Jana Bażyńskiego 1A, 80-309 Gdańsk, Poland.
Entropy (Basel). 2023 Jan 3;25(1):94. doi: 10.3390/e25010094.
The theorem developed by John Bell constituted the starting point of a revolution that translated a philosophical question about the nature of reality into the broad and intense field of research of the quantum information technologies. We focus on a system of two qubits prepared in a random, mixed state, and we study the typical behavior of their nonlocality via the CHSH-Bell inequality. Afterward, motivated by the necessity of accounting for inefficiency in the state preparation, we address to what extent states close enough to one with a high degree of nonclassicality can violate local realism with a previously chosen experimental setup.
约翰·贝尔提出的定理构成了一场革命的起点，这场革命将一个关于现实本质的哲学问题转化为量子信息技术广阔而活跃的研究领域。我们关注处于随机混合态的两个量子比特组成的系统，并通过CHSH-贝尔不等式研究它们非定域性的典型行为。之后，出于考虑态制备中效率问题的必要性，我们探讨在多大程度上，足够接近具有高度非经典性的态能够利用先前选定的实验装置违背局域实在论。
