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arXiv · 2112.12375

Entropic uncertainty relations from equiangular tight frames and their applications

Alexey E. Rastegin
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Abstract

Finite tight frames are interesting in various topics including questions of quantum information. Each complex tight frame leads to a resolution of the identity in the Hilbert space. Symmetric informationally complete measurements are a special class of equiangular tight frames. Applications of such frames in quantum physics deserve more attention than they have obtained. We derive uncertainty relations for a quantum measurement assigned to an equiangular tight frame. Main results follow from estimation of the corresponding index of coincidence. State-dependent and state-independent formulations are both addressed. Also, we discuss applications of considered measurements to detect entanglement and other correlations.

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Alexey E. Rastegin. 2021-12-23. Entropic uncertainty relations from equiangular tight frames and their applications. https://doi.org/10.1098/rspa.2022.0546

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