Estimation on geometric measure of quantum coherence
Hai-Jun Zhang, Bin Chen, Ming Li, Shao-Ming Fei, and Gui-Lu Long
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Submission date: 15. Aug. 2017
published in: Communications in theoretical physics, 67 (2017) 2, p. 166-170
DOI number (of the published article): 10.1088/0253-6102/67/2/166
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We study the geometric measure of quantum coherence recently proposed in [Phys. Rev. Lett. 115, 020403 (2015)]. Both lower and upper bounds of this measure are provided. These bounds are shown to be tight for a class of important coherent states -- maximally coherent mixed states. The trade-off relation between quantum coherence and mixedness for this measure is also discussed.