Scaling of the von Neumann entropy in a two-electron system near the ionization threshold
Scaling of the von Neumann entropy in a two-electron system near the ionization threshold
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DOI：
10.1103/physreva.75.042331
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发表时间：
2007-04-01
影响因子：
2.9
通讯作者：
Serra, Pablo
中科院分区：
文献类型：
--
作者：
Osenda, Omar;Serra, Pablo
在过去的几年里，人们对量子相变附近的纠缠的关键行为进行了深入的研究。少体量子系统在电离点附近表现出关键行为。我们研究了接近电离阈值的类原子系统的冯·诺依曼熵的标度特性。使用有限尺寸缩放方法，我们计算与冯诺依曼熵相关的临界电荷和临界指数。分析了临界少体量子系统中量子相变附近的纠缠行为与冯诺依曼熵行为之间的并行性。
The critical behavior of entanglement near a quantum phase transition has been studied intensely over the past few years. Few-body quantum systems show critical behavior near the ionization point. We investigate the scaling properties of the von Neumann entropy for an atomiclike system near the ionization threshold. Using finite size scaling methods we calculate the critical charge and the critical exponent associated to the von Neumann entropy. The parallelism between the behavior of entanglement near a quantum phase transition and the behavior of the von Neumann entropy in a critical few-body quantum system is analyzed.