论文标题
淬灭Anderson局部相互作用的Bose-Einstein凝结在一个维度上的混沌动力学
Quench induced chaotic dynamics of Anderson localized interacting Bose-Einstein condensates in one dimension
论文作者
论文摘要
我们研究了原子相互作用对一维准静脉光学晶格和随机高斯无序电位中玻色的凝结物的定位和相关动力学的影响。当缺乏相互作用时,冷凝物会表现出定位,随着我们将相互作用强度提高到两种潜在类型的阈值之外,这会削弱。我们通过将相互作用强度瞬时驱散到零并研究冷凝物的动力学来检查局部和离域状态,并使用耗时的相关器进一步证实。时间相关器的时间行为显示局部状态的常规动力学,同时显示了DELAICALIDED状态的时间混乱。我们通过分析时间相关器的功率谱密度来确认这种动态行为。我们进一步确定,冷凝物在两种电势方面都接受了通往混乱动力学的准二级途径。最后,我们介绍了不同的非线性和无序强度的最大Lyapunov指数的变化,这些变性在时间相关函数显示混乱行为的状态下具有正值。通过此,我们建立了冷凝水的空间离地状态与其时间混乱之间的牢固联系。
We study the effect of atomic interaction on the localization and the associated dynamics of Bose-Einstein condensates in a one-dimensional quasiperiodic optical lattice and random Gaussian disordered potentials. When the interactions are absent, the condensates exhibit localization, which weakens as we increase the interaction strength beyond a threshold value for both potential types. We inspect the localized and delocalized states by perturbing the system via quenching the interaction strength instantaneously to zero and studying the dynamics of the condensate, which we further corroborate using the out-of-time-order correlator. The temporal behaviour of the time correlator displays regular dynamics for the localized state, while it shows temporal chaos for the delocalized state. We confirm this dynamical behaviour by analyzing the power spectral density of the time correlator. We further identify that the condensate admits a quasiperiodic route to chaotic dynamics for both potentials. Finally, we present the variation of the maximal Lyapunov exponents for different nonlinearity and disorder strengths that have a positive value in the regime where the time correlator function shows chaotic behaviour. Through this, we establish the strong connection between the spatially delocalized state of the condensate and its temporal chaos.