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arXiv quant-ph/0105138quant-ph
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真实测量和量子芝诺效应

Real measurements and Quantum Zeno effect

Julius Ruseckas, B. Kaulakys

摘要:

1977年,米什拉和苏达尚证明了一个不稳定的粒子在被持续观察时永远不会被发现衰变。他们称这种效应为量子芝诺效应(或悖论)。后来人们意识到,频繁的测量也会加速衰变(量子反芝诺效应)。本文利用确定的测量模型研究了量子Zeno效应。我们考虑到测量的有限持续时间和有限精度。导出了测量过程中跳跃概率的一般方程。我们发现,测量可以导致抑制(量子芝诺效应)或加速(量子反芝诺效应)的演变,这取决于与测量设备的相互作用的强度和系统的属性。然而,进化不能完全停止。

英文摘要:

In 1977, Mishra and Sudarshan showed that an unstable particle would never be found decayed while it was continuously observed. They called this effect the quantum Zeno effect (or paradox). Later it was realized that the frequent measurements could also accelerate the decay (quantum anti-Zeno effect). In this paper we investigate the quantum Zeno effect using the definite model of the measurement. We take into account the finite duration and the finite accuracy of the measurement. A general equation for the jump probability during the measurement is derived. We find that the measurements can cause inhibition (quantum Zeno effect) or acceleration (quantum anti-Zeno effect) of the evolution, depending on the strength of the interaction with the measuring device and on the properties of the system. However, the evolution cannot be fully stopped.

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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