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arXiv 2112.04028quant-phgr-qchep-th
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量子参考系与算子的非交换值

Quantum Frames of Reference and the Noncommutative Values of Observables

National Central University(中央大学)

Otto C. W. Kong

AI总结:

本文探讨了量子参考系变换中算子的非交换值概念,通过qubit系统案例分析,揭示了量子涨落和纠缠对参考系变换的影响。

摘要:

基于最近的量子参考系变换关系式 formulation,特别是量子空间平移的案例,我们分析了固定态下算子的`值'如何变化。即经典描述的精确类比,例如粒子的x坐标在参考系平移后新原点位于x=2时,坐标值减少2个单位。量子参考系变换的本质是考虑作为(新)参考系的物理对象的量子涨落,甚至纠缠。我们展示了最近引入的量子算子非交换值概念如何成功地给出这种确定描述。还介绍了可观测量的离散或有限谱的类比变换的 formulations,以及qubit系统中的案例分析。讨论了所有量子参考系变换对称系统的演变图景的问题。

英文摘要:

Based on a recent relational formulation of quantum reference frame transformations, especially with a case of quantum spatial translations in particular, we analyzed how the `value' of an observable for a fixed state change. That is the exact analog of the classical description, for example, of the value of the $x$-coordinate for a particle decrease by 2 units when we perform a translation of the reference frame putting the new origin at $x=2$. The essence of the quantum reference frame transformations is to have the quantum fluctuations, and even entanglement, of the physical object which serves as the (new) reference frame, taken into account. We illustrate how the recently introduced notion of the noncommutative values of quantum observables gives such a definite description successfully. Formulations, and an analysis of a case example in qubit systems, of analog transformations for observables with a discrete or finite spectrum is also presented. Issues about the evolving picture of the symmetry system of all quantum reference frame transformations discussed.

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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