Experimental Evidence for Quantum Tunneling Time
Experimental Evidence for Quantum Tunneling Time
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DOI：
10.1103/physrevlett.119.023201
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发表时间：
2017-07-14
影响因子：
8.6
通讯作者：
Moshammer, Robert
中科院分区：
文献类型：
--
作者：
Camus, Nicolas;Yakaboylu, Enderalp;Moshammer, Robert
研究了强场隧道电离过程中电子动力学的前一百阿秒。我们从理论上量化了电子在连续体中的经典轨迹如何从隧道过程中出现，并使用从阿塔时钟测量并行获得的结果来测试结果。这里通过比较在完全相同的条件下用近红外激光脉冲（1300 nm）电离的两种原子势略有偏差的原子（氩和氪）的动量分布，实现了对隧道势垒的特别高的灵敏度。实验与理论之间的一致性为“隧道出口”处电子的非零隧道时间延迟和非零纵向动量提供了明确的证据。
The first hundred attoseconds of the electron dynamics during strong field tunneling ionization are investigated. We quantify theoretically how the electron's classical trajectories in the continuum emerge from the tunneling process and test the results with those achieved in parallel from attoclock measurements. An especially high sensitivity on the tunneling barrier is accomplished here by comparing the momentum distributions of two atomic species of slightly deviating atomic potentials (argon and krypton) being ionized under absolutely identical conditions with near-infrared laser pulses (1300 nm). The agreement between experiment and theory provides clear evidence for a nonzero tunneling time delay and a nonvanishing longitudinal momentum of the electron at the "tunnel exit."