Koll Lisa-Marie, Maikowski Laura, Drescher Lorenz, Witting Tobias, Vrakking Marc J J
Max-Born-Institut, Max-Born-Strasse 2A, 12x489 Berlin, Germany.
Phys Rev Lett. 2022 Jan 28;128(4):043201. doi: 10.1103/PhysRevLett.128.043201.
Entanglement is one of the most intriguing aspects of quantum mechanics and lies at the heart of the ongoing second quantum revolution, where it is a resource that is used in quantum key distribution, quantum computing, and quantum teleportation. We report experiments demonstrating the crucial role that entanglement plays in pump-probe experiments involving ionization, which are a hallmark of the novel research field of attosecond science. We demonstrate that the degree of entanglement in a bipartite ion + photoelectron system, and, as a consequence, the degree of vibrational coherence in the ion, can be controlled by tailoring the spectral properties of the attosecond extreme ultraviolet laser pulses that are used to create them.
量子纠缠是量子力学中最引人入胜的方面之一，也是正在进行的第二次量子革命的核心，在量子密钥分发、量子计算和量子隐形传态中，它都是一种被利用的资源。我们报告了一些实验，这些实验证明了纠缠在涉及电离的泵浦-探测实验中所起的关键作用，而这类实验是阿秒科学这一新兴研究领域的一个标志。我们证明，通过调整用于产生二分离子+光电子系统的阿秒极紫外激光脉冲的光谱特性，可以控制该系统中的纠缠程度，进而控制离子中的振动相干程度。
