论文标题
量子Zeno动力学冻结动量方向增强的量子隧道
Enhanced quantum tunneling in quantum Zeno dynamics freezing momentum direction
论文作者
论文摘要
量子隧道是大量物理现象涉及的基本量子机械效应。它的控制将影响这些现象及其基于它们的技术。我们表明，通过潜在屏障的量子隧道概率可以增加以通过经常监测动量方向的隧道粒子进行量子Zeno动力学接近统一。我们首先将动量方向的测量结果模拟为选择性的von Neumann投影，然后作为粒子与探针颗粒的非选择性，方向敏感的相互作用。非选择性测量比选择性测量在增强量子隧穿概率方面更有效。
Quantum tunneling is a fundamental quantum mechanical effect involved in plenty of physical phenomena. Its control would impact these phenomena and the technologies based on them. We show that the quantum tunneling probability through a potential barrier can be increased to approach unity in a quantum Zeno dynamics undergone by the tunneling particle in which the direction of the momentum is frequently monitored. We first model the measurements of the momentum direction as selective von Neumann projections, and then as nonselective, direction-sensitive interactions of the particle with probe particles. Nonselective measurements are more efficient than selective measurements in enhancing the quantum tunneling probability.
