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arXiv 1701.01072quant-ph
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一种强多观测不确定关系

A Stronger Multi-observable Uncertainty Relation

Qiu-Cheng Song, Jun-Li Li, Guang-Xiong Peng, Cong-Feng Qiao

摘要:

测不准关系是量子力学的核心,它描述了在量子态的制备过程中非对易观测量的不相容性。一个重要的问题是如何提高测不准关系的下界。在这里,我们提出了一个方差为基础的总和不确定性关系$N$不兼容的观测值强于简单的推广的不确定性关系的两个观测值由Maccone和帕蒂[物理。{ \bf 113},260401(2014)]。对自旋- $\frac{1}{2}$和自旋- $1$粒子的测不准关系与其它相关测不准关系的进一步比较表明,所得到的测不准关系给出了一个更好的下界.

英文摘要:

Uncertainty relation lies at the heart of quantum mechanics, characterizing the incompatibility of non-commuting observables in the preparation of quantum states. An important question is how to improve the lower bound of uncertainty relation. Here we present a variance-based sum uncertainty relation for $N$ incompatible observables stronger than the simple generalization of the uncertainty relation for two observables derived by Maccone and Pati [Phys. Rev. Lett. {\bf113}, 260401 (2014)]. Further comparisons of our uncertainty relation with other related ones for spin-$\frac{1}{2}$ and spin-$1$ particles indicate that the obtained uncertainty relation gives a better lower bound.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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