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arXiv 1809.00516math-phmath.MPquant-ph
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谐振子的间接测量

Indirect Measurements of a Harmonic Oscillator

Martin Fraas, Gian Michele Graf, Lisa Hänggli

摘要:

一旦仪器被内化,量子系统的测量本身就变成了量子力学过程。由于各种原因,这种视角的转变可能会导致不同的物理预测。我们提出了一个模型,描述系统和设备,并组成一个谐振子耦合到一个字段。运动方程是一个量子随机微分方程。通过解决它,我们建立了确保两个视角兼容的条件,因为该装置确实测量了它理想地应该测量的可观察对象。

英文摘要:

The measurement of a quantum system becomes itself a quantum-mechanical process once the apparatus is internalized. That shift of perspective may result in different physical predictions for a variety of reasons. We present a model describing both system and apparatus and consisting of a harmonic oscillator coupled to a field. The equation of motion is a quantum stochastic differential equation. By solving it we establish the conditions ensuring that the two perspectives are compatible, in that the apparatus indeed measures the observable it is ideally supposed to.

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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