Ni Zhenbo, Peng Yonggang, Zheng Yujun
School of Physics, Shandong University, Jinan 250100, China.
Entropy (Basel). 2024 Dec 11;26(12):1080. doi: 10.3390/e26121080.
The quantum Zeno effect (QZE) is widely employed in quantum engineering due to the issue of frequent measurements freezing a quantum system. In this study, the quantum Zeno factor is introduced to characterize the quantum Zeno capacity of a quantum system. The quantum Zeno factor reveals that the quantum Zeno effect is dependent on the evolution mode of quantum states, which is semi-irrelevant to conventional energy uncertainty and extends the QZE domain. The Zeno factor provides a new consideration to qualify the (anti-)Zeno capacity of a quantum system for its applications: a large quantum Zeno factor value indicates that a quantum system is of a QZE quality. The numerical results of the quantum Zeno capacity are shown using two typical examples: tailing the dynamic evolution modes using the quantum Zeno factor in a three-level system, and quantifying the message exchange between qubits in a coupled qubit system using a quantum Zeno factor.
由于频繁测量会使量子系统冻结这一问题，量子芝诺效应（QZE）在量子工程中得到了广泛应用。在本研究中，引入了量子芝诺因子来表征量子系统的量子芝诺容量。量子芝诺因子表明，量子芝诺效应取决于量子态的演化模式，这与传统的能量不确定性半无关，并扩展了量子芝诺效应的领域。芝诺因子为量子系统的（反）芝诺容量在其应用中的评估提供了新的考量：量子芝诺因子值较大表明量子系统具有量子芝诺效应特性。使用两个典型示例展示了量子芝诺容量的数值结果：在一个三能级系统中利用量子芝诺因子追踪动态演化模式，以及在一个耦合量子比特系统中使用量子芝诺因子量化量子比特之间的信息交换。
