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- W4287665247 abstract "Since violations of inequalities implied by non-contextual and local hidden variable theories are observed, it is essential to determine the set of (non-)contextual states. Along this direction, one should determine the conditions under which quantum contextuality is observed. It is also important to determine how one can find maximally contextual qutrits. In this work, we revisit the Klyachko-Can-Biniciou{g}lu-Shumovsky (KCBS) scenario where we observe a five-measurement state-dependent contextuality. We investigate possible symmetries of the KCBS pentagram, i.e., the conservation of the contextual characteristic of a qutrit-system. For this purpose, the KCBS operator including five cyclic measurements is rotated around the Z-axis. We then check a set of rotation angles to determine the contextuality and non-contextuality regions for the eigenstates of the spin-1 operator for an arbitrary rotation. We perform the same operation for the homogeneous linear combination of the eigenstates with spin values +1 and -1. More generally, we work on the real subgroup of the three dimensional Hilbert space to determine the set of (non-)contextual states under certain rotations in the physical Euclidean space $mathbb{E}^3$. Finally, we show data on Euler rotation angles for which maximally contextual retrits (qutrits of the real Hilbert space) are found, and derive mathematical relations through data analysis between Euler angles and qutrit states parameterized with spherical coordinates." @default.
- W4287665247 created "2022-07-25" @default.
- W4287665247 creator A5024968845 @default.
- W4287665247 creator A5088391496 @default.
- W4287665247 date "2020-09-18" @default.
- W4287665247 modified "2023-10-05" @default.
- W4287665247 title "Retrit States Violating the KCBS Inequality and Necessary Conditions for Maximal Contextuality" @default.
- W4287665247 doi "https://doi.org/10.1063/5.0163019" @default.
- W4287665247 hasPublicationYear "2020" @default.
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