The modified trace distance of coherence is constant on most pure states
The modified trace distance of coherence is constant on most pure states
复制标题
修改后的相干迹距离在大多数纯态上是恒定的
DOI:
10.1088/1751-8121/aaa275
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发表时间:
2017-08
影响因子:
2.1
通讯作者:
Nung-Sing Sze
中科院分区:
文献类型:
--
作者:
Pan-Shun Lau;Chi-Kwong Li;Yiu-Tung Poon;Nung-Sing Sze
Recently, the much-used trace distance of coherence was shown to not be a proper measure of coherence, so a modification of it was proposed. We derive an explicit formula for this modified trace distance of coherence on pure states. Our formula shows that, despite satisfying the axioms of proper coherence measures, it is likely not a good measure to use, since it is maximal (equal to 1) on all except for an exponentially-small (in the dimension of the space) fraction of pure states.
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