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arXiv quant-ph/0606086quant-ph
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测量驱动的量子演化

Measurement-driven quantum evolution from a known state

L. Roa, G. A. Olivares-Renteria, M. L. L. de Guevara, A. Delgado

摘要:

研究了在不使用幺正演化的情况下,将一个已知的初始量子态驱动到一个已知的纯态的问题。这个任务可以通过冯·诺依曼测量过程来实现,引入N个连续测量的可观测量,以便使系统的状态接近目标状态。我们证明了通过在过程中加入适当的观测量,可以有意义地增加投射到目标状态的概率,即当N增加时,它收敛于1。我们还讨论了该方案的物理实现。

英文摘要:

We study the problem of driving a known initial quantum state onto a known pure state without using a unitary evolution. This task can be achieved by means of von Neumann measurement processes, introducing N observables which are consecutively measured in order to approach the state of the system to the target state. We proved that the probability of projecting onto the target state can be increased meaningfully by adding suitable observables to the process, that is, it converges to 1 when N increases. We also discuss a physical implementation of this scheme.

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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