相干耦合玻色-爱因斯坦凝聚体中的叠加非线性波

Interaction control and bright solitons in coherently-coupled Bose-Einstein condensates

We demonstrate fast control of the interatomic interactions in a Bose-Einstein condensate by coherently coupling two atomic states with intra- and inter-state scattering lengths of opposite signs. We measure the elastic and inelastic scattering properties of the system and find good agreement with a theoretical model describing the interactions between dressed states. In the attractive regime, we observe the formation of bright solitons formed by dressed-state atoms. Finally, we study the response of the system to an interaction quench from repulsive to attractive values, and observe how the r…

相干耦合玻色-爱因斯坦凝聚体中的非线性波

Nonlinear waves in coherently coupled Bose-Einstein condensates

本文考虑准一维两组分玻色-爱因斯坦凝聚体，它的组分之间存在相干耦合，如自旋-轨道耦合凝聚体。我们研究如何非线性修改的动力学的基本激发。频谱有两个分支，它们以不同的方式受到影响。上支经历调制不稳定性，该调制不稳定性通过与下支的长波-短波共振来稳定。下支稳定。在弱非线性和小色散的限制下，它由Korteweg-de Vries方程或Gardner方程描述，这取决于系统参数的值。

二维极子流体中相干驱动的玻色-爱因斯坦凝聚体的相域壁

Phase domain walls in coherently driven Bose-Einstein condensates

研究相干驱动的玻色-爱因斯坦凝聚体中相域壁的形成机制，探讨其拓扑性质及与涡旋的相互作用，揭示相域壁在不同初始状态下形成的拓扑类型及运动特性。

Manipulation of vector solitons in a system of inhomogeneous coherently coupled nonlinear Schrödinger models with variable nonlinearities

We investigate non-autonomous solitons in a general coherently coupled nonlinear Schrödinger (CCNLS) system with temporally modulated nonlinearities and with an external harmonic oscillator potential. This general CCNLS system encompasses three distinct types of CCNLS equations that describe the dynamics of beam propagation in an inhomogeneous Kerr-like nonlinear optical medium for different choices of nonlinear polarizations owing to the anisotropy of the medium. We identify a generalized similarity transformation to relate the considered model into the standard integrable homogeneous coupled…

Self-Pulsing in driven-dissipative photonic Bose-Hubbard dimers

We experimentally investigate the nonlinear dynamics of two coupled fiber ring resonators, coherently driven by a single laser beam. We comprehensively explore the optical switching arising when scanning the detuning of the undriven cavity, and show how the driven cavity detuning dramatically changes the resulting hysteresis cycle. By driving the photonic dimer out-of-equilibrium, we observe the occurrence of stable self-switching oscillations near avoided resonance crossings. All results agree well with the driven-dissipative Bose-Hubbard dimer model in the weakly coupled regime.