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Paper detail

The l1 Norm of Coherence of Assistance

We introduce and study the l1 norm of coherence of assistance both theoretically and operationally. We first provide an upper bound for the l1 norm of coherence of assistance and show a necessary and sufficient condition for the saturation of the upper bound. For two and three dimensional quantum states, the analytical expression of the l1 norm of coherence of assistance is given. Operationally, the mixed quantum coherence can always be increased with the help of another party' s local measurement and one way classical communication since the l1 norm of coherence of assistance, as well as the relative entropy of coherence of assistance, is shown to be strictly larger than the original coherence. The relation between the l1 norm of coherence of assistance and entanglement is revealed. Finally, a comparison between the l1 norm of coherence of assistance and the relative entropy of coherence of assistance is made.

preprint2020arXivOpen access
Ming-Jing ZhaoTeng MaQuan QuanHeng FanRajesh Pereira
quant-ph
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Ming-Jing ZhaoTeng MaQuan QuanHeng FanRajesh Pereira

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