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arXiv 0801.1814quant-phcond-mat.other
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弱测量:探测器动力学的影响

Weak measurement: Effect of the detector dynamics

Antonio Di Lorenzo, J. Carlos Egues

摘要:

一个可观察的测量与预和后选择的一般方法。弱测量的限制进行了详细的研究,它表明,探针的相位,包括一个哈密顿的贡献,引起可观察到的效果,因为探针的相干性是必不可少的概念,复杂的弱值是有意义的。作为一个具体的例子,考虑自旋分量的测量。我们发现,在这种情况下,弱值的虚部的贡献是相当大的。

英文摘要:

A general approach to the measurement of an observable with pre- and post-selection is presented. The limit of weak measurement is studied in detail, and it is shown that the phase of the probe, including a Hamiltonian contribution to it, gives rise to observable effects, since the coherence of the probe is essential for the concept of complex weak value to be meaningful. As a particular example, the measurement of a spin component is considered. We find that the contribution of the imaginary part of the weak value is sizeable in this case.

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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