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Uncertainty relations for quantum coherence with respect to mutually unbiased bases

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Abstract

The concept of quantum coherence, including various ways to quantify the degree of coherence with respect to the prescribed basis, is currently the subject of active research. The complementarity of quantum coherence in different bases was studied by deriving upper bounds on the sum of the corresponding measures. To obtain a two-sided estimate, lower bounds on the coherence quantifiers are also of interest. Such bounds are naturally referred to as uncertainty relations for quantum coherence. We obtain new uncertainty relations for coherence quantifiers averaged with respect to a set of mutually unbiased bases (MUBs). To quantify the degree of coherence, the relative entropy of coherence and the geometric coherence are used. Further, we also derive novel state-independent uncertainty relations for a set of MUBs in terms of the min-entropy.

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  1. Department of Theoretical Physics, Irkutsk State University, Irkutsk, Russia

    Alexey E. Rastegin

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Rastegin, A.E. Uncertainty relations for quantum coherence with respect to mutually unbiased bases. Front. Phys. 13, 130304 (2018). https://doi.org/10.1007/s11467-017-0713-7

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