论文标题
与三体相互作用的相互作用的莫特绝缘子缺陷
Quantum walks of interacting Mott insulator defects with three-body interactions
论文作者
论文摘要
由于统计性质与与之相关的多体相互作用之间的相互作用，相互作用的粒子的量子步行可能会显示出非平凡的特征。我们分析了单个尺寸图的单位填充物在均匀的玻色粒绝缘子顶部的相互作用缺陷的量子步行。虽然单个粒子缺陷的量子步行显示出微不足道的特征，但两个粒子的情况表现出有趣的量子行走逆转现象，这是附加现场三体有吸引力相互作用的函数。在没有三体相互作用的情况下，获得了一对颗粒的量子步行，并且随着三体相互作用的强度变得越来越有吸引力，因此出现了独立的粒子行为。有趣的是，三体相互作用的进一步增加导致与一对颗粒相关的量子步行的重新表现。使用真实空间密度演化，BLOCH振荡以及两粒子相关函数研究了这种量子步行逆转现象。
Quantum walks of interacting particles may display non-trivial features due to the interplay between the statistical nature and the many-body interactions associated to them. We analyze the quantum walk of interacting defects on top of an uniform bosonic Mott insulator at unit filling in an one dimensional graph. While the quantum walk of single particle defect shows trivial features, the case of two particles exhibits interesting phenomenon of quantum walk reversal as a function of additional onsite three-body attractive interactions. In the absence of the three-body interaction a quantum walk of pairs of particles is obtained and as the strength of the three-body interaction becomes more and more attractive, the independent particle behavior in quantum walk appears. Interestingly, further increase in the three-body interaction leads to the re-appearance of the quantum walk associated to a pair of particles. This quantum-walk reversal phenomenon is studied using the real-space density evolution, Bloch oscillation as well as two-particle correlation functions.
