Vrakking Marc J J
Max-Born-Institut, Max-Born-Straβe 2A, 12489 Berlin, Germany.
Phys Rev Lett. 2021 Mar 19;126(11):113203. doi: 10.1103/PhysRevLett.126.113203.
Calculations are presented of vibrational wave packet dynamics in H_{2}^{+} ions formed by ionization of neutral H_{2} by a pair of attosecond extreme ultraviolet laser pulses, using time-delayed dissociation of the cation by an ultraviolet probe pulse. The strength of experimentally observable two-level quantum beats as a function of the attosecond two-pulse delay can be related to ion+photoelectron entanglement resulting from the ionization process. This conclusion is supported by an evaluation of the purity of the reduced ion and photoelectron density matrices.
本文给出了利用紫外探测脉冲对阳离子进行延时解离，对由一对阿秒极紫外激光脉冲电离中性H₂形成的H₂⁺离子中的振动波包动力学进行的计算。作为阿秒双脉冲延迟函数的实验可观测的两能级量子拍频强度，可与电离过程产生的离子+光电子纠缠相关。这一结论得到了对约化离子和光电子密度矩阵纯度评估的支持。
