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arXiv 1002.2760quant-phcond-mat.quant-gas
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芝诺动力学与量子态的可分辨性

Zeno Dynamics and Distinguishability of Quantum States

Augusto Smerzi

摘要:

根据量子芝诺效应,对一个系统的频繁观测可以显著减缓其动力学演化。我们证明了Zeno动力学是不可分辨的量子态之间的投影测量的结果。问题的物理时间尺度由Cramer-Rao下界提供,该下界测量希尔伯特空间中沿着路径的状态的可扩展性。最后,我们表明,与粒子纠缠态的芝诺动力学可能需要相当小的测量间隔比经典的相关状态,并提出了一个现实的干涉实验来测试的预测。

英文摘要:

According to the quantum Zeno effect, the frequent observations of a system can dramatically slow down its dynamical evolution. We show that the Zeno dynamics is the result of projective measurements among quantum states which are indistinguishable. The physical time scale of the problem is provided by the Cramer-Rao lower bound, which measure the distinguishability of states along a path in the Hilbert space. We finally show that the Zeno dynamics with particle entangled states might require quite smaller measurement intervals than classically correlated states, and propose a realistic interferometric experiment to test the prediction.

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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