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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Based-nonequilibrium-environment non-markovianity, quantum Fisher information and quantum coherence
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Based-nonequilibrium-environment non-markovianity, quantum Fisher information and quantum coherence

机译:基于非Quilibium-Enviround非市场非市场,量子Fisher信息和量子连贯性

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In this work, we investigate the non-Markovianity, quantum Fisher information (QFI) and quantum coherence of a qubit in a nonequilibrium environment and have obtained the expressions of QFI and quantum coherence as well as their relationship. We have also discussed in detail the influences of the different environment parameters on these quantum effects. The results show that the suitable parameters of the nonequilibrium environment can retard the QFI and quantum coherence in both Markovian and non-Markovian regions. In addition, the smaller memory effects and the larger the jumping rate, the greater the QFI and quantum coherence. And a larger QFI naturally corresponds to a larger quantum coherence, which indicates that the quantum coherence can enlarge the QFI and can effectively enhance the quantum metrology.
机译:在这项工作中,我们调查非标准环境中Qubit的非市场性,量子Fisher信息(QFI)和量子相干性,并获得了QFI和量子相干性的表达以及它们的关系。 我们还详细讨论了不同环境参数对这些量子效应的影响。 结果表明,非QuibiRibium环境的合适参数可以在马尔可维亚和非马尔可夫地区延缓QFI和量子一致性。 此外,较小的记忆效果和跳跃速率越大,QFI和量子相干越大。 较大的QFI自然对应于更大的量子相干性,这表明量子相干性可以增大QFI,并且可以有效地增强量子计量。

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