The Tightness of Multipartite Coherence from Spectrum Estimation.
The Tightness of Multipartite Coherence from Spectrum Estimation.
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DOI:
10.3390/e23111519
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发表时间:
2021-11-15
期刊:
影响因子:
--
通讯作者:
Lu H
中科院分区:
文献类型:
--
作者:
Ding QM;Fang XX;Lu H
Detecting multipartite quantum coherence usually requires quantum state reconstruction, which is quite inefficient for large-scale quantum systems. Along this line of research, several efficient procedures have been proposed to detect multipartite quantum coherence without quantum state reconstruction, among which the spectrum-estimation-based method is suitable for various coherence measures. Here, we first generalize the spectrum-estimation-based method for the geometric measure of coherence. Then, we investigate the tightness of the estimated lower bound of various coherence measures, including the geometric measure of coherence, the -norm of coherence, the robustness of coherence, and some convex roof quantifiers of coherence multiqubit GHZ states and linear cluster states. Finally, we demonstrate the spectrum-estimation-based method as well as the other two efficient methods. We observe that the spectrum-estimation-based method outperforms other methods in various coherence measures, which significantly enhances the accuracy of estimation.
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影响因子:
8.6
作者:
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通讯作者:
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DOI:
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发表时间:
2008-01-01
期刊:
RECENT ADVANCES IN LEARNING AND CONTROL
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通讯作者:
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