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arXiv quant-ph/0405068quant-ph
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时变Zeno子空间中的暗演化

Dark evolution in a time-varying Zeno subspace

C. K. Law

摘要:

我们研究了量子系统在序贯测量影响下的演化。测量方案在$n^{\rm th}$步骤区分系统是否处于指定状态$| {f_n}>$,其中$| {f_n}>$随$n$变化。暗演化对应于所有测量都给出负结果的情况。我们证明了在连续测量极限下暗演化是幺正的。我们推导了有效哈密顿量,并指出了$| {f_n}>$如何控制量子态输运。

英文摘要:

We investigate the evolution of a quantum system under the influence of sequential measurements. The measurement scheme distinguishes whether or not the system is in a specified state $| {f_n}>$ at the $n^{\rm th}$ step, where $| {f_n}>$ varies with $n$. Dark evolution corresponds to the situation when all measurements give negative results. We show that dark evolution is unitary in the continuous measurement limit. We derive the effective Hamiltonian, and indicate how $| {f_n}>$ controls quantum state transport.

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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